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/routes/ivantiArchive.js

@@ -9,7 +9,15 @@ function createIvantiArchiveRouter(db, requireAuth) {
     // All routes require authentication
     router.use(requireAuth(db));
 
-    // GET / — List archive records with optional ?state= filter
+    /**
+     * GET /
+     * List archive records with optional state filtering.
+     *
+     * @query {string} [state] - Filter by lifecycle state (ACTIVE, ARCHIVED, RETURNED, CLOSED)
+     * @returns {Object} 200 - { archives: Array<ArchiveRecord>, total: number }
+     * @returns {Object} 400 - { error: string } when state param is invalid
+     * @returns {Object} 500 - { error: string } on database failure
+     */
     router.get('/', async (req, res) => {
         const { state } = req.query;
 
@@ -44,9 +52,17 @@ function createIvantiArchiveRouter(db, requireAuth) {
         }
     });
 
-    // GET /stats — Summary counts by state
+    /**
+     * GET /stats
+     * Summary counts of archive records by lifecycle state.
+     * ACTIVE is implicit: live findings in the cache that have no ARCHIVED/RETURNED archive record.
+     *
+     * @returns {Object} 200 - { ACTIVE: number, ARCHIVED: number, RETURNED: number, CLOSED: number, total: number }
+     * @returns {Object} 500 - { error: string } on database failure
+     */
     router.get('/stats', async (req, res) => {
         try {
+            // Count archive records by state
             const rows = await new Promise((resolve, reject) => {
                 db.all(
                     `SELECT current_state, COUNT(*) as count
@@ -60,15 +76,31 @@ function createIvantiArchiveRouter(db, requireAuth) {
             });
 
             const stats = { ACTIVE: 0, ARCHIVED: 0, RETURNED: 0, CLOSED: 0 };
-            let total = 0;
 
             for (const row of rows) {
                 if (stats.hasOwnProperty(row.current_state)) {
                     stats[row.current_state] = row.count;
                 }
-                total += row.count;
             }
 
+            // Compute ACTIVE: total live findings minus those with ARCHIVED or RETURNED records
+            const cacheRow = await new Promise((resolve, reject) => {
+                db.get(
+                    'SELECT total FROM ivanti_findings_cache WHERE id = 1',
+                    (err, row) => {
+                        if (err) reject(err);
+                        else resolve(row);
+                    }
+                );
+            });
+
+            const liveFindingsCount = (cacheRow && cacheRow.total) || 0;
+            // Findings that are ARCHIVED or RETURNED are "missing" from the live set,
+            // so ACTIVE = live count (all findings currently present in sync results)
+            stats.ACTIVE = liveFindingsCount;
+
+            const total = stats.ACTIVE + stats.ARCHIVED + stats.RETURNED + stats.CLOSED;
+
             res.json({ ...stats, total });
         } catch (err) {
             console.error('Archive stats error:', err);
@@ -76,7 +108,15 @@ function createIvantiArchiveRouter(db, requireAuth) {
         }
     });
 
-    // GET /:findingId/history — Transition history for a finding
+    /**
+     * GET /:findingId/history
+     * Transition history for a specific archived finding, ordered by most recent first.
+     * Returns an empty transitions array if the finding has no archive record.
+     *
+     * @param {string} findingId - Ivanti finding identifier (route param)
+     * @returns {Object} 200 - { finding_id: string, transitions: Array<TransitionRecord> }
+     * @returns {Object} 500 - { error: string } on database failure
+     */
     router.get('/:findingId/history', async (req, res) => {
         const { findingId } = req.params;