fix: resolve 5 pre-merge issues in finding archive tracking

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

backend/migrations/add_finding_archive_tables.js

@@ -16,7 +16,7 @@ db.serialize(() => {
             finding_title TEXT NOT NULL DEFAULT '',
             host_name TEXT NOT NULL DEFAULT '',
             ip_address TEXT NOT NULL DEFAULT '',
-            current_state TEXT NOT NULL CHECK(current_state IN ('ACTIVE', 'ARCHIVED', 'RETURNED', 'CLOSED')),
+            current_state TEXT NOT NULL CHECK(current_state IN ('ARCHIVED', 'RETURNED', 'CLOSED')),
             last_severity REAL NOT NULL DEFAULT 0,
             first_archived_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
             last_transition_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,