* fix(library): scoped live search FTS, race, and multi-server advanced search
Scope track_fts live search to active server_id so multi-server libraries
no longer show empty or wrong-server hits. Match Navidrome-style any-word
prefix matching and GROUP BY artist/album dedupe on track_fts only.
Frontend: parallel local vs search3 race (empty waits, 8s network timeout),
merge supplemental hits after both settle, debug via Settings → Logging →
Debug (frontend_debug_log). Advanced Search FTS subqueries use the same
server scope fix.
* docs: CHANGELOG and credits for PR #868 live search fix
cucadmuh