[bugfix] - remove outliers from APY calculation (#11867)

## Description 

remove outliers from APY calculation

## Test Plan 

Tested locally using mainnet data

```
{
    "jsonrpc": "2.0",
    "result": {
        "apys": [
            {
                "address": "0x11ec7353e9e08ed4ca13b935ad930a2f937112736aec5eedd08c95cc5cd4c264",
                "apy": 0.0767903236026177
            },
            {
                "address": "0x8f8ea04f3b751533db8b8da0a40eba1ca8332a92680f058d83b9459d061aaa54",
                "apy": 0.07951951637709039
            },
            {
                "address": "0xdead0072f3a00a250cc8dd90315e92822130258105a494f831ee9bb1576fd71f",
                "apy": 0.0763476531184526
            },
            {
                "address": "0xf4da1d0d8eba4aed89542daa6d720fed039012f36a2ec42563c9adb50726a09c",
                "apy": 0.08415307387484125
            },
            {
                "address": "0x4ce8d9d329879f3b361c9515f48acc0f91b283a7305f6c9c789b0c8d1ebf43f2",
                "apy": 0.07635222774745001
            },
            {
                "address": "0x633344069731c08d06212beb1c2fd2f9d87e53295335733c3e4bb059950513d6",
                "apy": 0.07833910221708192
            },
            {
                "address": "0x054f9044e0fd71c2ff621981c332ba41d686fb705143d1dfd3a3b69a46e8f66e",
                "apy": 0.08340897002262472
            },
            {
                "address": "0xdfc9709adae2917a9be213c8d651b150517fbc8b99106bbd3020e618335ccf18",
                "apy": 0.08340712205702847
            },
            {
                "address": "0x184fbf9d6c2d2d3f27e27fe3ca2d3b4080bd406221e345e2d36633e638e988e1",
                "apy": 0.08368151355129208
            },
            {
                "address": "0x68cf08c4ef8b0462d8c3879f4e26cc371fbddd844650d0c41a9c3badc8104609",
                "apy": 0.08362019043509814
            },
            {
                "address": "0x876e2ad4ba0375c7752d24ca47c69e7096e6dbfd82a215612a08f47cffebcfbc",
                "apy": 0.08439628964583548
            },
            {
                "address": "0xa608b66f7ae2201286f7dd07a8b073cde7955b35056629636a6c9b3f5275f384",
                "apy": 0.08357650776665738
            },
            {
                "address": "0xbc7e7537564bd939b62e5b24477ac00ba8cef33ccec72d63090a080a1253b725",
                "apy": 0.08101583328630199
            },
            {
                "address": "0xe85738f9cb22cf80f77b861a9e9aca13c0a297cf0f1c075d35a9b3fb94bf6f89",
                "apy": 0.08340550638821245
            },
            {
                "address": "0x9062fc51d91056246dc31f2b818a4ddb113a044ec22c8dd0674616bbe56f7192",
                "apy": 0.07775822593332585
            },
            {
                "address": "0x970f9006836b3eead979bbb97d2ae8f8f331a0834209f2bc878ed142fa9ad1ee",
                "apy": 0.07948272358000133
            },
            {
                "address": "0x0c1bebfe4c2258f16282f3ab186151c91f4349c5b2956e831a8f670a71709b90",
                "apy": 0.0834002857486982
            },
            {
                "address": "0x2761e3db0abe9a2029291980ebad551b7c68dd53d1150adfa9f9ed8a2368458e",
                "apy": 0.08227432929877608
            },
            {
                "address": "0x43b8f743162704af85214b0d0159fbef11aae0e996a8e9eac7fafda7fc5bd5f2",
                "apy": 0.08228113337322121
            },
            {
                "address": "0x1ea86ae398023fb87b522673020b1709640221566de33585acfcf6a865f6f467",
                "apy": 0.08341019005597021
            },
            {
                "address": "0xbba318294a51ddeafa50c335c8e77202170e1f272599a2edc40592100863f638",
                "apy": 0.081195130242627
            },
            {
                "address": "0x1e1985024aafe50a8e4eafc5a89eb7ecd58ba08c39f37688bee00bd55c8b2059",
                "apy": 0.08339787490829798
            },
            {
                "address": "0x1290ab8bca1c136d2b86967674a43a0f5cb30b352f90233cc37ebf7452b96787",
                "apy": 0.07785527377775672
            },
            {
                "address": "0x91b3d7211dbe057d02e2aa06f1cd678f1408438d494d2e783e0b67a77cca4599",
                "apy": 0.08271898434137988
            },
            {
                "address": "0xc3af1f2ca3dc69a70616fa3707f67a9367f8d01d4b75a40520b931d42241695e",
                "apy": 0.08132147223871973
            },
            {
                "address": "0x27002933548d3c8a5d8e2fbddc541e1e66aeeaff1b60465c2df52974f96ad3d0",
                "apy": 0.0769049641915051
            },
            {
                "address": "0x92c7bf9914897e8878e559c19a6cffd22e6a569a6dd4d26f8e82e0f2ad1873d6",
                "apy": 0.07903361624174741
            },
            {
                "address": "0x9782704c86b40c55e709fb866865c507c732fa0af5b87246feabfef4423f4f90",
                "apy": 0.083619918619497
            },
            {
                "address": "0x0350925241ae8d4083fe4b1104e14dd28d2ffeced9d7575551c50c41b99995fb",
                "apy": 0.08706517677142459
            },
            {
                "address": "0x96c01291eb1d4f02aacc1e466d2980a8fdfbea96661ad8da4f8569af49b619a1",
                "apy": 0.07829338652970093
            },
            {
                "address": "0xd01cb1b0c196042fde8af58e9b3208fe5e64d920bb3f9ace9064c4b7d8c64cf5",
                "apy": 0.08227901886465176
            },
            {
                "address": "0x4f9791d5c689306862b4eb9a25914c5433b7dfd5cb4827b461f7dfc813f28a7c",
                "apy": 0.08279856076223709
            },
            {
                "address": "0xceb2b8c295ee322cd299e4bdc3d3d0dce1dc9c85eb683f7d82ea2e4f8f4e259f",
                "apy": 0.07732411415768306
            },
            {
                "address": "0xec73ec4d6b2a9403937b12ca625f7b3124c4459ff4e3caae6cf6376edefb9f3a",
                "apy": 0.0827376078484503
            },
            {
                "address": "0x9c7376a3f903cbe1f467a4edbefb54bb5a2f10886496c591ca955c22f0ae10c9",
                "apy": 0.0830607147116446
            },
            {
                "address": "0x641c736d38b329dae7879d5164566e9256825c5fc82b2565b50d45e6a6522c1d",
                "apy": 0.07920385432559618
            },
            {
                "address": "0xe0e042d1aacba8abf6f32be86c555a08eae5ba2b7972c912f7451104391e8c57",
                "apy": 0.08059594462616228
            },
            {
                "address": "0x885c0345bbf4441f39b98caf2295640a4dc3696ee9e8bc68f2101ca5e6f9bbf1",
                "apy": 0.08615125632724542
            },
            {
                "address": "0xd1d00bcc9661120fc6b0f233a2f6810f39e71b39fc637cb1b9e5635edb3b0c40",
                "apy": 0.08339685470901416
            },
            {
                "address": "0xa987c410fa047b973d479555894c85208c4450ef65fd1d8d5911b46fbca83365",
                "apy": 0.07857924154467437
            },
            {
                "address": "0xd6edebcfa598dcb6e71037b34f09ddc6a20dd874edca1d89d5ccd11ec070d040",
                "apy": 0.144855545841425
            },
            {
                "address": "0x61953ea72709eed72f4441dd944eec49a11b4acabfc8e04015e89c63be81b6ab",
                "apy": 0.07845494509031511
            },
            {
                "address": "0x333b6f2a08d138e8c98d84258859b701a4215e2fabb2aee69300f9f4604cda92",
                "apy": 0.07634698842180662
            },
            {
                "address": "0x262d556ae0d627450a91a353ddc3aaeb9ff0549172daf4d94ffb3a4401e6f930",
                "apy": 0.08340640725716462
            },
            {
                "address": "0x5d6ee8465b31200131242fa79e84893518f6e3929d995f385ca9eda74db2361d",
                "apy": 0.07740255807264153
            },
            {
                "address": "0x55d2bd7e02c0863914c3af925188c6947e9209b39eb304c630525d69294c3be0",
                "apy": 0.08308721039435422
            },
            {
                "address": "0xa528acf0c239c28985da3170870629eb58dd9fb2683548317ce0a218427abb8d",
                "apy": 0.08340884738773623
            },
            {
                "address": "0x9b8b11c9b2336d35f2db8d5318ff32de51b85857f0e53a5c31242cf3797f4be4",
                "apy": 0.07739267560157075
            },
            {
                "address": "0x0ae4b2b4ed34dd551a01a946e51c0c431726faf5568659560f76b31642588468",
                "apy": 0.08269233824954789
            },
            {
                "address": "0xefa5f0435f230579dc95f219a1a8929f91b98cba727d7c1de8b10738be431ade",
                "apy": 0.08377835465743202
            },
            {
                "address": "0xe719405821d7bd32ded86a2aed34f06f3dacd09c91241ec3f34b219ebeddc6f0",
                "apy": 0.08419423240838812
            },
            {
                "address": "0x02189430bd03a05813f0b5998dd6e400d21e831d31f609bb0142b869e0fa020b",
                "apy": 0.08296219328761227
            },
            {
                "address": "0xc21c40c94c712f17244d8518688dbaaa81ba232c15cb13dbba138ead55451e43",
                "apy": 0.08555569126109819
            },
            {
                "address": "0x4430b86069d8850d9bee199739e5fc90bb0f323a5a7735f431ec7a5fb5409e6b",
                "apy": 0.08227630686883229
            },
            {
                "address": "0xcb7efe4253a0fe58df608d8a2d3c0eea94b4b40a8738c8daae4eb77830c16cd7",
                "apy": 0.08437811037186428
            },
            {
                "address": "0xf9c6994c28a882fc87c0e69a44d0bf29796ff8256621d26eea49f3d776c6133e",
                "apy": 0.0842026091205063
            },
            {
                "address": "0x3047b5258a4ba6d7a6bea9ada69cb336ecfb24fe1c3cea83094396665eba0de5",
                "apy": 0.08445492617999843
            },
            {
                "address": "0x25afdbeaa4d530119cb464715cead11e0a1ef86256f3020128fbd7013954a99d",
                "apy": 0.08239582729681746
            },
            {
                "address": "0xe08d75c562928f58bdbe697e7e35de4802535722337d88305669286e649a104c",
                "apy": 0.08238433802466145
            },
            {
                "address": "0x6f4e73ee97bfae95e054d31dff1361a839aaadf2cfdb873ad2b07d479507905a",
                "apy": 0.08321106327999342
            },
            {
                "address": "0xf7abab51fdf9b4626ce706a5dfbb3da13a715700149bc816dfbee2ae73d61be5",
                "apy": 0.0779734008396977
            },
            {
                "address": "0x22a4a737eb86d98a62336dd4cf6b957321884dda7446b7c4c720f2c9090aa7c3",
                "apy": 0.08183699947979421
            },
            {
                "address": "0xc6b70330451f4c163ce75625510bf99a8c782a5c5b1dd400a08fc20b2086dc00",
                "apy": 0.07953985856109057
            },
            {
                "address": "0xd939e3fe7ea4d503f84767dca0c58b7ec1c71f085638a4c0611aa64aa71b5fcf",
                "apy": 0.07853804606325254
            },
            {
                "address": "0x574c1625635f7311eb6df2f5aa2f0482c33e83498063942c0585f2363fc0ee02",
                "apy": 0.08378586885547401
            },
            {
                "address": "0x9d0438098adf019a8c5a8708c7fc0075f6f19fcd251bf3eaabe0c7f74036ce5a",
                "apy": 0.07590478018537901
            },
            {
                "address": "0x0de5a09a0b029b0c4f1017a58dc78a2341511a7f6ba4925287aa836c1166dbbe",
                "apy": 0.07797567427519454
            },
            {
                "address": "0xd30018ec3f5ff1a3c75656abf927a87d7f0529e6dc89c7ddd1bd27ecb05e3db2",
                "apy": 0.08400912768879297
            },
            {
                "address": "0xfdac6c544f156578adb6adfa351bb4d1fc85f9025af67818ffef87ce868b1644",
                "apy": 0.07791522891671364
            },
            {
                "address": "0x2622b55585033f26b0a86b378de1a6284c2dda531e52ef30ea87a8df81f4630a",
                "apy": 0.08164891237343322
            },
            {
                "address": "0xee6e1f8e2726e6bc2bf36ab7dd5736afff076704b12271a332f49f8e7d0bf756",
                "apy": 0.08031695384381976
            },
            {
                "address": "0xa92837bac51949cd6bac41dcec57d2a769f3c2cd2e8c0512f3eea0a2a2102b94",
                "apy": 0.08567578454512367
            },
            {
                "address": "0x8ecaf4b95b3c82c712d3ddb22e7da88d2286c4653f3753a86b6f7a216a3ca518",
                "apy": 0.06775186008972557
            },
            {
                "address": "0xb7847468db546ba85acb9dcdc0c5190b3ca6427d713ff52a4f8183c81f8a39e1",
                "apy": 0.0773993543026319
            },
            {
                "address": "0xa2ae7af4173722d07df5096a52f305f5d94578f4b78d301056a4b3b05e636488",
                "apy": 0.084183259418137
            },
            {
                "address": "0x8a0907e2990baebbbb87c12821db4845b034e45f937167e68b4925ac3465335a",
                "apy": 0.07590736285553394
            },
            {
                "address": "0x60ce054d9dc5771fcbeb9a52a1881a97d3092efc8eb29befc3e60281dbe80ca0",
                "apy": 0.08267801290660629
            },
            {
                "address": "0xb788ef0e41bc4105cd4c90ff269d07ccf0c8c62552b981c38966f338f69e0e09",
                "apy": 0.07797215547531865
            },
            {
                "address": "0xe05098c2049b9e4c37be7a3be42214498603b981d514a581ef741dc628651b1a",
                "apy": 0.08378719916868484
            },
            {
                "address": "0x7e254f0f55e24b8a6995567241618f750d0d94f2cf49b36703869779d2ee4327",
                "apy": 0.08016627059490415
            },
            {
                "address": "0xf72816357f8e5638c90ec5b0f7eecee362bac0ef7e64822ea6d686730251a7a0",
                "apy": 0.07844010843999379
            },
            {
                "address": "0x3b5664bb0f8bb4a8be77f108180a9603e154711ab866de83c8344ae1f3ed4695",
                "apy": 0.07797552190031744
            },
            {
                "address": "0xc64e58562d424e248abce5b886b264209c23d05b7b75bc5a1a5e137700f0ddf8",
                "apy": 0.08327935606924466
            },
            {
                "address": "0xa36a0602be0fcbc59f7864c76238e5e502a1e13150090aab3c2063d34dde1d8a",
                "apy": 0.08151377535907785
            },
            {
                "address": "0x59031a8ba47e04dade3eea9dba0c7ccf8ed3ab9d51d7561add640f687add04ed",
                "apy": 0.07797147664134545
            },
            {
                "address": "0x51ff201c85824151a1c4f80637f39032788b0f00de88e97a6f7deb56d2e38f49",
                "apy": 0.08265888612853813
            },
            {
                "address": "0x00ae78d3e5ba5d6b8de32455474f52811b95617cbad39ebf4f9e2daf67187407",
                "apy": 0.08459118501349115
            },
            {
                "address": "0xa2bf32db91ad54684cfd8a4e1d85f7672875d62421d40a8d993f601cff9b61ff",
                "apy": 0.083259164729933
            },
            {
                "address": "0xad1ca3844353d0c1b86fea2d848fda0c62439168c29e132ef17f9964a19a551f",
                "apy": 0.08364301180763246
            },
            {
                "address": "0xfcb6007ef5f253d4e8ad894a4278bd780a1e1b7b5a17ffbf47f10e73b2508e66",
                "apy": 0.08011117499960137
            },
            {
                "address": "0x4fffd0005522be4bc029724c7f0f6ed7093a6bf3a09b90e62f61dc15181e1a3e",
                "apy": 0.08438166321956832
            },
            {
                "address": "0xdac37b139f9376a45bf6fda1dd691962008ac9647f59086c90a6ad2777f27336",
                "apy": 0.079952557862968
            },
            {
                "address": "0x24f61ae027301ee5ea68559b6d5f96de1c4879e1c85586044e08132d6af6ffd3",
                "apy": 0.08339198519151103
            },
            {
                "address": "0x16c48b033a860c39905842eb52178d612c323e4418d5a90b29dba4ebc5895b00",
                "apy": 0.08231893261904848
            },
            {
                "address": "0xcda5da2f66fae9abe9620900c4e91d5b72e514b01fc17fbb27587e6c3f3b9f36",
                "apy": 0.07730140354262642
            },
            {
                "address": "0xdd7330643eed25139d9fed288361e4cd3db54c7e0e8daecf26de4f99bbd71352",
                "apy": 0.07821979200256017
            },
            {
                "address": "0xc77c9ba2f86fe51cefb7aa340c6956f5c0818f999004389ab95330ba839dfb0c",
                "apy": 0.08328426732029927
            },
            {
                "address": "0xd1dbb08191b4ae8e227935669c1862ba75a41cd7df5970002eafb2f365c32ed8",
                "apy": 0.08220524085078099
            },
            {
                "address": "0xefc45ee5de49f376b66b73f6bab9fbc0c452b18e1cfc5035c268c6786dd8bb63",
                "apy": 0.09569840106361724
            },
            {
                "address": "0xc1b37fe62cf632c4447af7cd8342297400735fcb849aca29c89f061a619aca44",
                "apy": 0.09348722082442944
            }
        ],
        "epoch": "27"
    },
    "id": 1
}
```

crates/sui-json-rpc/src/governance_api.rs

@@ -282,7 +282,9 @@ impl GovernanceReadApiServer for GovernanceReadApi {
                 .rates
                 .into_iter()
                 .filter_map(|(epoch, rate)| {
-                    if epoch >= system_state_summary.stake_subsidy_start_epoch {
+                    if epoch >= system_state_summary.stake_subsidy_start_epoch
+                        && (1.0 / rate.rate()) < 1.2
+                    {
                         Some(rate)
                     } else {
                         None