Fixed/added ISM APIs.

[dblock]

Description

I was curious about the 26 "specified_but_not_provided" endpoints that surface in our coverage report, starting with the /_plugins/_transform/_preview API. This one has the wrong verb (and other problems), so I began fixing it.

• Fix /_plugins/_transform/_preview, needs a body, has the wrong verb.
• Added ISM CRUD APIs. I spent some time in the ISM plugin code to extract some of these, so likely several aspects missing that we can fix as we go.

Issues Resolved

Part of #224.

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[github-actions]

Changes Analysis

Commit SHA: 7c2ff32
Comparing To SHA: d05ba73

API Changes

Summary

├─┬Paths
│ ├──[➕] path (11485:3)
│ ├──[➕] path (11607:3)
│ ├──[➕] path (3850:3)
│ ├──[➕] path (11546:3)
│ ├──[➕] path (11506:3)
│ ├──[➕] path (3740:3)
│ ├──[➕] path (11527:3)
│ ├──[➕] path (3778:3)
│ ├──[➕] path (3795:3)
│ ├──[➕] path (3759:3)
│ └─┬/_plugins/_transform/_preview
│   ├──[➖] get (6714:7)❌ 
│   └──[➕] post (6841:7)
└─┬Components
  ├──[➕] requestBodies (25819:7)
  ├──[➕] requestBodies (24936:7)
  ├──[➕] requestBodies (24946:7)
  ├──[➕] requestBodies (24941:7)
  ├──[➕] responses (27366:7)
  ├──[➕] responses (27336:7)
  ├──[➕] responses (27361:7)
  ├──[➕] responses (27356:7)
  ├──[➕] responses (27371:7)
  ├──[➕] responses (27341:7)
  ├──[➕] responses (27346:7)
  ├──[➕] responses (27351:7)
  ├──[➕] parameters (20442:7)
  ├──[➕] parameters (20464:7)
  ├──[➕] parameters (20436:7)
  ├──[➕] parameters (20426:7)
  ├──[➕] parameters (20478:7)
  ├──[➕] parameters (20471:7)
  ├──[➕] parameters (20452:7)
  ├──[➕] parameters (20416:7)
  ├──[➕] parameters (20458:7)
  ├──[➕] schemas (49184:7)
  ├──[➕] schemas (48995:7)
  ├──[➕] schemas (49122:7)
  ├──[➕] schemas (48911:7)
  ├──[➕] schemas (49254:7)
  ├──[➕] schemas (49032:7)
  ├──[➕] schemas (49231:7)
  ├──[➕] schemas (49173:7)
  ├──[➕] schemas (49099:7)
  ├──[➕] schemas (49056:7)
  ├──[➕] schemas (48997:7)
  ├──[➕] schemas (49029:7)
  ├──[➕] schemas (48980:7)
  ├──[➕] schemas (49275:7)
  ├──[➕] schemas (49049:7)
  ├──[➕] schemas (49071:7)
  ├──[➕] schemas (49026:7)
  ├──[➕] schemas (49129:7)
  ├──[➕] schemas (48953:7)
  ├──[➕] schemas (49104:7)
  ├──[➕] schemas (48959:7)
  ├──[➕] schemas (48975:7)
  ├──[➕] schemas (49058:7)
  ├──[➕] schemas (49222:7)
  ├──[➕] schemas (48985:7)
  ├──[➕] schemas (48999:7)
  ├──[➕] schemas (48990:7)
  ├──[➕] schemas (49153:7)
  ├──[➕] schemas (48978:7)
  ├──[➕] schemas (49089:7)
  ├──[➕] schemas (49229:7)
  ├──[➕] schemas (49013:7)
  ├──[➕] schemas (49046:7)
  ├──[➕] schemas (49157:7)
  ├──[➕] schemas (48993:7)
  ├──[➕] schemas (49087:7)
  ├──[➕] schemas (49144:7)
  ├──[➕] schemas (49220:7)
  ├──[➕] schemas (49004:7)
  ├──[➕] schemas (49162:7)
  ├──[➕] schemas (49082:7)
  ├──[➕] schemas (49115:7)
  ├──[➕] schemas (49215:7)
  ├──[➕] schemas (48973:7)
  └──[➕] schemas (49041:7)

Document Element	Total Changes	Breaking Changes
paths	12	1
components	66	0

• ❌ BREAKING Changes: 1 out of 78
• Removals: 1
• Additions: 77
• Breaking Removals: 1

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/10847624552/artifacts/1929293379

API Coverage

	Before	After	Δ
Covered (%)	545 (53.38 %)	560 (54.85 %)	15 (1.47 %)
Uncovered (%)	476 (46.62 %)	461 (45.15 %)	-15 (-1.47 %)
Unknown	26	25	-1

[github-actions]

Spec Test Coverage Analysis

Total	Tested
585	290 (49.57 %)