Add support for ML neural search.

[dblock]

Description

This completes end-to-end flow for neural search.

Added /_plugins/_ml/models/{model_id}/_deploy, _undeploy and knn_vector type to passage_embedding.

Issues Resolved

Closes #315.

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[github-actions]

Changes Analysis

Commit SHA: 392a0b6
Comparing To SHA: 42fd4d7

API Changes

Summary

├─┬Paths
│ ├──[➕] path (3857:3)
│ └──[➕] path (3842:3)
└─┬Components
  ├──[➕] responses (25705:7)
  ├──[➕] responses (25657:7)
  ├──[➕] parameters (19578:7)
  ├──[➕] parameters (19560:7)
  ├──[➕] schemas (45857:7)
  ├──[➕] schemas (36832:7)
  ├──[➕] schemas (35230:7)
  ├──[➕] schemas (35204:7)
  ├──[➕] schemas (36826:7)
  ├──[➕] schemas (45848:7)
  ├──[➕] schemas (35219:7)
  ├──[➕] schemas (45852:7)
  ├─┬_common.query_dsl:QueryContainer
  │ └──[➕] properties (37098:9)
  ├─┬ml._common:Task
  │ └──[➕] properties (45843:9)
  └─┬_common.mapping:Property
    ├──[➕] oneOf (35065:7)
    ├─┬ONEOF
    │ └──[🔀] $ref (35220:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35470:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35154:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34762:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35253:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35263:13)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35838:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35292:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34613:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34643:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35748:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35609:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34815:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35093:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35117:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34681:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35240:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35827:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35654:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34846:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35027:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34994:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35814:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35303:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35590:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34712:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34656:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34981:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34735:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34952:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34788:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35175:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35143:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34918:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35106:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35548:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34624:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35010:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35483:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35358:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35342:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (34828:9)❌ 
    ├─┬ONEOF
    │ └──[🔀] $ref (35701:9)❌ 
    └─┬ONEOF
      └──[🔀] $ref (35053:9)❌ 

Document Element	Total Changes	Breaking Changes
paths	2	0
components	59	44

• ❌ BREAKING Changes: 44 out of 61
• Modifications: 44
• Additions: 17
• Breaking Modifications: 44

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/10371987146/artifacts/1807014485

API Coverage

	Before	After	Δ
Covered (%)	522 (51.13 %)	524 (51.32 %)	2 (0.19 %)
Uncovered (%)	499 (48.87 %)	497 (48.68 %)	-2 (-0.19 %)
Unknown	26	26	0

[github-actions]

Spec Test Coverage Analysis

Total	Tested
550	212 (38.55 %)

[nhtruong]

I've learned a big word today 😄