[dex] Add events to msgs

[udpatil]

Describe your changes and provide context

This adds events for many of the dex messages for potential downstream consumption

Testing performed to validate your change

Tested locally, and verified on 20 node cluster that TPS isn't materially affected:

{
    "Summary (excl. edge block)": {
        "average_block_time": 1.3750865,
        "average_throughput_per_block": 69.85714285714286,
        "average_throughput_per_sec": 50.80199889762779,
        "number_of_full_blocks": 7,
        "full_blocks": [
            3760,
            3762,
            3764,
            3765,
            3766,
            3782,
            3785
        ],
        "total_txs_num": 489
    },
    "Detail (incl. edge blocks)": {
        "blocks": [
            3757,
            3760,
            3762,
            3764,
            3765,
            3766,
            3782,
            3785,
            3802
        ],
        "txs_per_block": [
            103,
            95,
            39,
            108,
            4,
            111,
            29,
            103,
            17
        ]
    },
    "Best block": {
        "height": 3766,
        "tps": 360.38961038961037,
        "tx_mapping": {
            "oracle": 17,
            "dex": 94
        },
        "block_time_ms": 308
    }
}

[github-actions]

Package	Line Rate	Complexity	Health
github.com/sei-protocol/sei-chain/aclmapping/bank	83%	0	✔
github.com/sei-protocol/sei-chain/aclmapping/dex	100%	0	✔
github.com/sei-protocol/sei-chain/aclmapping/oracle	100%	0	✔
github.com/sei-protocol/sei-chain/aclmapping/staking	96%	0	✔
github.com/sei-protocol/sei-chain/aclmapping/tokenfactory	96%	0	✔
github.com/sei-protocol/sei-chain/aclmapping/utils	0%	0	❌
github.com/sei-protocol/sei-chain/aclmapping/wasm	83%	0	✔
github.com/sei-protocol/sei-chain/app	61%	0	➖
github.com/sei-protocol/sei-chain/app/antedecorators	76%	0	✔
github.com/sei-protocol/sei-chain/oracle/price-feeder/config	85%	0	✔
github.com/sei-protocol/sei-chain/oracle/price-feeder/oracle	67%	0	➖
github.com/sei-protocol/sei-chain/oracle/price-feeder/oracle/provider	49%	0	❌
github.com/sei-protocol/sei-chain/oracle/price-feeder/router/v1	45%	0	❌
github.com/sei-protocol/sei-chain/store/whitelist/cachemulti	100%	0	✔
github.com/sei-protocol/sei-chain/store/whitelist/kv	100%	0	✔
github.com/sei-protocol/sei-chain/store/whitelist/multi	100%	0	✔
github.com/sei-protocol/sei-chain/utils	59%	0	➖
github.com/sei-protocol/sei-chain/utils/datastructures	90%	0	✔
github.com/sei-protocol/sei-chain/utils/logging	100%	0	✔
github.com/sei-protocol/sei-chain/x/dex	58%	0	➖
github.com/sei-protocol/sei-chain/x/dex/cache	87%	0	✔
github.com/sei-protocol/sei-chain/x/dex/client/cli/query	22%	0	❌
github.com/sei-protocol/sei-chain/x/dex/contract	51%	0	➖
github.com/sei-protocol/sei-chain/x/dex/exchange	94%	0	✔
github.com/sei-protocol/sei-chain/x/dex/keeper	64%	0	➖
github.com/sei-protocol/sei-chain/x/dex/keeper/abci	29%	0	❌
github.com/sei-protocol/sei-chain/x/dex/keeper/msgserver	79%	0	✔
github.com/sei-protocol/sei-chain/x/dex/keeper/query	82%	0	✔
github.com/sei-protocol/sei-chain/x/dex/migrations	88%	0	✔
github.com/sei-protocol/sei-chain/x/dex/types	1%	0	❌
github.com/sei-protocol/sei-chain/x/dex/types/utils	100%	0	✔
github.com/sei-protocol/sei-chain/x/dex/types/wasm	86%	0	✔
github.com/sei-protocol/sei-chain/x/epoch	11%	0	❌
github.com/sei-protocol/sei-chain/x/epoch/keeper	66%	0	➖
github.com/sei-protocol/sei-chain/x/epoch/types	2%	0	❌
github.com/sei-protocol/sei-chain/x/mint	0%	0	❌
github.com/sei-protocol/sei-chain/x/mint/keeper	61%	0	➖
github.com/sei-protocol/sei-chain/x/mint/simulation	95%	0	✔
github.com/sei-protocol/sei-chain/x/mint/types	3%	0	❌
github.com/sei-protocol/sei-chain/x/nitro/client/cli	45%	0	❌
github.com/sei-protocol/sei-chain/x/nitro/keeper	80%	0	✔
github.com/sei-protocol/sei-chain/x/nitro/replay	63%	0	➖
github.com/sei-protocol/sei-chain/x/oracle	67%	0	➖
github.com/sei-protocol/sei-chain/x/oracle/keeper	83%	0	✔
github.com/sei-protocol/sei-chain/x/oracle/simulation	18%	0	❌
github.com/sei-protocol/sei-chain/x/oracle/types	3%	0	❌
github.com/sei-protocol/sei-chain/x/tokenfactory/keeper	85%	0	✔
github.com/sei-protocol/sei-chain/x/tokenfactory/types	2%	0	❌
Summary	15% (5224 / 34802)	0	❌