Filters are evaluated once into an id set used by both search branches.
Adds tests for age/genre/mechanic filters with a search term, rank 2 vs 3
and null p_limit. approxNormalize uses NFKD. Perf script checks confirm_local
value and unix socket and re-analyzes after rollback. Adds
docs/specs/3-katalog-suche-umsetzung.md (measurements, log check incl. GET
finding), release checklist section 2a and the CSV-only note for alt titles.
Refs #3
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
