docs: update search API documentation with unified endpoint
- Update search_media_items.md with comprehensive fuzzy filter documentation
- Document all filter parameters (author_filter, series_filter, genre_filter, language_filter)
- Document autocomplete parameters (authors, genres, series, languages)
- Add fuzzy search examples (asimov → Asimov, Isaac)
- Add exact match with quotes examples ("Foundation and Empire")
- Add combined search + filters examples
- Add field-specific search examples for autocomplete
- Document error responses (400, 401, 404)
- Remove deprecated filter_sort_media_items.md (functionality moved to search endpoint)
- Update api-reference.md to reflect unified endpoint
- Update api/api-reference.md to reflect unified endpoint
All text filters use pg_trgm fuzzy matching (threshold: 0.3) except years/booleans which are exact.
john-okeefe
06800b9a27