Rename fullTextSearch composite filter to unifiedSearch

[pyramation]

Summary

Renames the composite GraphQL filter field from fullTextSearch to unifiedSearch to disambiguate it from the tsvector-specific fullTextSearchTsv per-adapter filter. The composite filter fans out a single text query to all text-compatible search adapters (tsvector, BM25, trgm) simultaneously — calling it "unified search" better describes what it does.

What changed:

• Plugin (graphile-search): field name fullTextSearch → unifiedSearch, config option enableFullTextSearch → enableUnifiedSearch
• Codegen (docs-utils.ts): CLI example docs updated (--where.unifiedSearch)
• Tests: all GraphQL queries and assertions updated across 4 test files
• In-repo skills: CLI examples in cli-public and cli-auth user references

What was intentionally left unchanged:

• The full_text_search metaschema DB table and all its generated SDK/ORM/CLI CRUD operations
• The tsvector adapter's filterPrefix: 'fullTextSearch' (producing fullTextSearchTsv)
• The fullTextSearches input on provisionTable

⚠️ Breaking change: Existing GraphQL queries using fullTextSearch or configs using enableFullTextSearch will need to update.

Review & Testing Checklist for Human

• Indentation consistency in test files: The edits to search.integration.test.ts (around lines 341-344, 475-480) and cli-e2e.test.ts (around lines 910-921) introduced inconsistent indentation relative to surrounding code. Verify these don't cause lint failures and fix if needed.
• No stray fullTextSearch references remain in plugin source: Run grep -r fullTextSearch graphile/graphile-search/src/ — should return zero hits (the tsvector adapter's filterPrefix is defined elsewhere).
• Downstream consumers: Confirm no other internal services or deployed apps query fullTextSearch directly — this is a breaking rename with no deprecation shim.
• External skills repo: A follow-up PR is needed for constructive-io/constructive-skills to update the same references there.

Suggested test plan: Run the graphile-search unit tests (cd graphile/graphile-search && pnpm test) and the server integration tests (cd graphql/server-test && pnpm test) to confirm the renamed field is correctly wired end-to-end.

Notes

• The constructive-skills external repo update is planned as a separate PR.
• The full_text_search.md skill reference files (describing the metaschema table CRUD) are correctly left untouched — those refer to the DB table, not the composite GraphQL filter.

Link to Devin session: https://app.devin.ai/sessions/e35003b7898c437e8d69a0c70b6020f2
Requested by: @pyramation

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