…ra/kibana into dashboard_align_attachment_to_api

* 'dashboard_align_attachment_to_api' of github.com:mbondyra/kibana: (45 commits)
  [OTel Tracing] HTTP instrumentation (elastic#258663)
  Replace deprecated EUI icons in files owned by @elastic/ml-ui (elastic#255624)
  [Codeowners] add missing codeowners for security_solution_api_integration tests (elastic#259223)
  [CI] fix bad imports that came from a merge-race (elastic#259383)
  Add `.claude/worktrees/` to `.gitignore` (elastic#259192)
  Improve unknown-key validation error message in @kbn/config-schema (elastic#258633)
  [ML] Update Security ML jobs to use entity analytics fields for host and user fields (elastic#255339)
  [Table sweep] Update table columns responsiveness in Index Management and Dashboards (elastic#259340)
  skip failing test suite (elastic#258790)
  skip failing test suite (elastic#259261)
  chore: util to clean cached images (elastic#259335)
  [Entity Store] Use last_seen for automated resolution watermark (elastic#258574)
  [One Workflow] Fix flaky alert trigger Scout test by removing order-dependent assertions (elastic#259299)
  Skip serverless Discover request counts tests for MKI (elastic#259333)
  [Security Solution] render header title in new document flyout in Security Solution and Discover (elastic#258166)
  [Agent Builder] register inference endpoint feature (elastic#259259)
  [Agent Builder] Skills Command Menu - Add descriptions and scope options to agent (elastic#258964)
  [Streams][Streamlang][API] Fully use meta({id}) to reuse schema partials in OAS output (elastic#259275)
  fix(files_example): add tableCaption to EuiInMemoryTable for a11y (elastic#258289)
  [Entity Store] Adding list endpoint with query filter (elastic#258320)
  ...

…als in OAS output (elastic#259275)

Resolves elastic#259277

## Summary

Improves the Streams and Streamlang OAS output by eliminating deeply
nested `anyOf > anyOf > allOf` structures in the generated spec. The
root cause was that `.meta({ id })` calls for most schemas lived only in
the `oas_definitions.ts` registry files rather than at definition time.
Because Zod v4's `.meta()` is immutable (it returns a new schema without
modifying the original), the exported schema variables themselves were
never registered — so every consumer inlined the full schema instead of
emitting a `$ref`.

## Root cause

```typescript
// oas_definitions.ts — old pattern: .meta() result is stored but the original
// conditionSchema variable remains unregistered
Condition: conditionSchema.meta({ id: 'Condition' }),
```

When conditionSchema was used in `routingDefinitionSchema.where`, the
OAS generator had no id to look up, so it inlined the full recursive
union. The fix is to call `.meta({ id })` at definition time so the
exported variable itself is the registered schema.

## Before / after

`PUT /api/streams/{name}` request body

```
# Before
schema:
  anyOf:
    - anyOf:
        - allOf: ...

# After
schema:
  $ref: '#/components/schemas/StreamUpsertRequest'
```

`GET /api/streams/{name}` response

```
# Before: three large inline objects
anyOf:
  - type: object
    properties: { ... hundreds of lines ... }
# After
$ref: '#/components/schemas/StreamGetResponse'
```

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>