Add spec for opensearch phone plugin.

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Description

Describe what this change achieves.

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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Changes Analysis

Commit SHA: ff187df
Comparing To SHA: 49b7c68

API Changes

Summary

├─┬Paths
│ └─┬/_snapshot/{repository}/{snapshot}
│   └─┬GET
│     └─┬Responses
│       └─┬200
│         └─┬application/json
│           └─┬Schema
│             ├──[➕] required (29743:17)❌ 
│             ├──[➖] required (29753:17)❌ 
│             ├──[➖] required (29754:17)❌ 
│             ├──[➖] properties (29749:15)❌ 
│             ├──[➖] properties (29738:15)❌ 
│             └──[➖] properties (29746:15)❌ 
└─┬Components
  ├──[➖] schemas (55111:7)❌ 
  ├──[➖] schemas (55096:7)❌ 
  ├──[➖] schemas (55376:7)❌ 
  ├──[➕] schemas (36963:7)
  ├─┬_common.analysis:Analyzer
  │ ├──[➕] oneOf (36187:7)
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36963:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (35955:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36859:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (37213:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (37129:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36028:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36390:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (37269:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36106:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36593:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (37118:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (35883:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (37158:13)❌ 
  │ ├─┬ONEOF
  │ │ └──[🔀] $ref (36447:13)❌ 
  │ └─┬ONEOF
  │   └──[🔀] $ref (36766:13)❌ 
  └─┬snapshot._common:SnapshotInfo
    ├──[➖] properties (55277:9)❌ 
    ├──[➖] properties (55251:9)❌ 
    └──[➖] properties (55259:9)❌ 

Document Element	Total Changes	Breaking Changes
paths	6	6
components	23	21

• ❌ BREAKING Changes: 27 out of 29
• Modifications: 15
• Removals: 11
• Additions: 3
• Breaking Removals: 11
• Breaking Modifications: 15
• Breaking Additions: 1

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/11297757199/artifacts/2046763697

API Coverage

	Before	After	Δ
Covered (%)	588 (57.59 %)	588 (57.59 %)	0 (0 %)
Uncovered (%)	433 (42.41 %)	433 (42.41 %)	0 (0 %)
Unknown	29	29	0

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The approach in this PR is not ideal, waiting on opensearch-project/OpenSearch#16219 and/or opensearch-project/opensearch-build#5096.