fix: Check inventory_snapshots for product_discovery output verification

raw_crawl_payloads only saved during baseline window (12:01-3:00 AM),
but inventory_snapshots are always saved. This caused product_discovery
tasks to fail verification outside the baseline window.

backend/src/tasks/task-service.ts

@@ -1001,9 +1001,31 @@ class TaskService {
     const claimedAt = task.claimed_at || task.created_at;
 
     switch (task.role) {
-      case 'product_refresh':
       case 'product_discovery': {
-        // Verify payload was saved to raw_crawl_payloads after task was claimed
+        // For product_discovery, verify inventory snapshots were saved (always happens)
+        // Note: raw_crawl_payloads only saved during baseline window, so check snapshots instead
+        const snapshotResult = await pool.query(
+          `SELECT COUNT(*)::int as count
+           FROM inventory_snapshots
+           WHERE dispensary_id = $1
+             AND captured_at > $2`,
+          [task.dispensary_id, claimedAt]
+        );
+
+        const snapshotCount = snapshotResult.rows[0]?.count || 0;
+
+        if (snapshotCount === 0) {
+          return {
+            verified: false,
+            reason: `No inventory snapshots found for dispensary ${task.dispensary_id} after ${claimedAt}`
+          };
+        }
+
+        return { verified: true };
+      }
+
+      case 'product_refresh': {
+        // For product_refresh, verify payload was saved to raw_crawl_payloads
         const payloadResult = await pool.query(
           `SELECT id, product_count, fetched_at
            FROM raw_crawl_payloads