feat: Stealth worker system with mandatory proxy rotation

## Worker System
- Role-agnostic workers that can handle any task type
- Pod-based architecture with StatefulSet (5-15 pods, 5 workers each)
- Custom pod names (Aethelgard, Xylos, Kryll, etc.)
- Worker registry with friendly names and resource monitoring
- Hub-and-spoke visualization on JobQueue page

## Stealth & Anti-Detection (REQUIRED)
- Proxies are MANDATORY - workers fail to start without active proxies
- CrawlRotator initializes on worker startup
- Loads proxies from `proxies` table
- Auto-rotates proxy + fingerprint on 403 errors
- 12 browser fingerprints (Chrome, Firefox, Safari, Edge)
- Locale/timezone matching for geographic consistency

## Task System
- Renamed product_resync → product_refresh
- Task chaining: store_discovery → entry_point → product_discovery
- Priority-based claiming with FOR UPDATE SKIP LOCKED
- Heartbeat and stale task recovery

## UI Updates
- JobQueue: Pod visualization, resource monitoring on hover
- WorkersDashboard: Simplified worker list
- Removed unused filters from task list

## Other
- IP2Location service for visitor analytics
- Findagram consumer features scaffolding
- Documentation updates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/discovery/discovery-crawler.ts

@@ -191,6 +191,23 @@ export async function runFullDiscovery(
     }
   }
 
+  // Step 5: Detect dropped stores (in DB but not in discovery results)
+  if (!dryRun) {
+    console.log('\n[Discovery] Step 5: Detecting dropped stores...');
+    const droppedResult = await detectDroppedStores(pool, stateCode);
+    if (droppedResult.droppedCount > 0) {
+      console.log(`[Discovery] Found ${droppedResult.droppedCount} dropped stores:`);
+      droppedResult.droppedStores.slice(0, 10).forEach(s => {
+        console.log(`    - ${s.name} (${s.city}, ${s.state}) - last seen: ${s.lastSeenAt}`);
+      });
+      if (droppedResult.droppedCount > 10) {
+        console.log(`    ... and ${droppedResult.droppedCount - 10} more`);
+      }
+    } else {
+      console.log(`[Discovery] No dropped stores detected`);
+    }
+  }
+
   return {
     cities: cityResult,
     locations: locationResults,
@@ -200,6 +217,107 @@ export async function runFullDiscovery(
   };
 }
 
+// ============================================================
+// DROPPED STORE DETECTION
+// ============================================================
+
+export interface DroppedStoreResult {
+  droppedCount: number;
+  droppedStores: Array<{
+    id: number;
+    name: string;
+    city: string;
+    state: string;
+    platformDispensaryId: string;
+    lastSeenAt: string;
+  }>;
+}
+
+/**
+ * Detect stores that exist in dispensaries but were not found in discovery.
+ * Marks them as status='dropped' for manual review.
+ *
+ * A store is considered "dropped" if:
+ * 1. It has a platform_dispensary_id (was verified via Dutchie)
+ * 2. It was NOT seen in the latest discovery crawl (last_seen_at in discovery < 24h ago)
+ * 3. It's currently marked as 'open' status
+ */
+export async function detectDroppedStores(
+  pool: Pool,
+  stateCode?: string
+): Promise<DroppedStoreResult> {
+  // Find dispensaries that:
+  // 1. Have platform_dispensary_id (verified Dutchie stores)
+  // 2. Are currently 'open' status
+  // 3. Have a linked discovery record that wasn't seen in the last discovery run
+  //    (last_seen_at in dutchie_discovery_locations is older than 24 hours)
+  const params: any[] = [];
+  let stateFilter = '';
+
+  if (stateCode) {
+    stateFilter = ` AND d.state = $1`;
+    params.push(stateCode);
+  }
+
+  const query = `
+    WITH recently_seen AS (
+      SELECT DISTINCT platform_location_id
+      FROM dutchie_discovery_locations
+      WHERE last_seen_at > NOW() - INTERVAL '24 hours'
+        AND active = true
+    )
+    SELECT
+      d.id,
+      d.name,
+      d.city,
+      d.state,
+      d.platform_dispensary_id,
+      d.updated_at as last_seen_at
+    FROM dispensaries d
+    WHERE d.platform_dispensary_id IS NOT NULL
+      AND d.platform = 'dutchie'
+      AND (d.status = 'open' OR d.status IS NULL)
+      AND d.crawl_enabled = true
+      AND d.platform_dispensary_id NOT IN (SELECT platform_location_id FROM recently_seen)
+      ${stateFilter}
+    ORDER BY d.name
+  `;
+
+  const result = await pool.query(query, params);
+  const droppedStores = result.rows;
+
+  // Mark these stores as 'dropped' status
+  if (droppedStores.length > 0) {
+    const ids = droppedStores.map(s => s.id);
+    await pool.query(`
+      UPDATE dispensaries
+      SET status = 'dropped', updated_at = NOW()
+      WHERE id = ANY($1::int[])
+    `, [ids]);
+
+    // Log to promotion log for audit
+    for (const store of droppedStores) {
+      await pool.query(`
+        INSERT INTO dutchie_promotion_log
+        (dispensary_id, action, state_code, store_name, triggered_by)
+        VALUES ($1, 'dropped', $2, $3, 'discovery_detection')
+      `, [store.id, store.state, store.name]);
+    }
+  }
+
+  return {
+    droppedCount: droppedStores.length,
+    droppedStores: droppedStores.map(s => ({
+      id: s.id,
+      name: s.name,
+      city: s.city,
+      state: s.state,
+      platformDispensaryId: s.platform_dispensary_id,
+      lastSeenAt: s.last_seen_at,
+    })),
+  };
+}
+
 // ============================================================
 // SINGLE CITY DISCOVERY
 // ============================================================