Jason Woltje 24d59e7595 feat(#65): implement full-text search with tsvector and GIN index ...

Add PostgreSQL full-text search infrastructure for knowledge entries:
- Add search_vector tsvector column to knowledge_entries table
- Create GIN index for fast full-text search performance
- Implement automatic trigger to maintain search_vector on insert/update
- Weight fields: title (A), summary (B), content (C)
- Update SearchService to use precomputed search_vector
- Add comprehensive integration tests for FTS functionality

Tests:
- 8/8 new integration tests passing
- 205/225 knowledge module tests passing
- All quality gates pass (typecheck, lint)

Refs #65

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

2026-02-02 14:25:45 -06:00

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