meeting_fts existed since migration 0001 but nothing ever wrote to it.
Adds reindex_fts (called from finalize_meeting/update_notes so the
index can't drift from what's on disk), a one-time startup backfill
for meetings finalized before this feature existed, delete_meeting
cleanup (meeting_fts is a virtual table with no FK/CASCADE support),
and a real Store::search() replacing the hardcoded stub. Query input
is phrase-quoted per token so stray FTS5 operators in free-text search
input can't throw a MATCH syntax error.
iamdoubz
68379f8f56