The fileCreated hook was not reliably enforced. Switch to postToolUse
on write operations so the check fires inline immediately after any
file write, making it impossible to skip. The prompt self-filters to
only act when the written file is in backend/migrations/.
1. ACTIVE state never populated — stats endpoint now computes ACTIVE from live findings cache count instead of querying archive table
2. CHECK constraint mismatch — migration now uses 3-state constraint (ARCHIVED, RETURNED, CLOSED) matching runtime initArchiveTables()
3. Archive filter click non-functional — handleArchiveStateClick now fetches and renders filtered archive list below summary bar
4. Hook glob pattern mismatch — changed **/migrate*.js to **/migrations/*.js so hook fires for actual migration filenames
5. Stale stats after sync — ArchiveSummaryBar polls every 60s and refreshes immediately after workflow sync via refreshKey prop
