Add taxableFlag to product updates, QUO-Narrative quote fallback, and orphan reconciliation

- Add taxableFlag boolean field to product update schema and forecast patch
- Fall back to QUO-Narrative product customerDescription for quote narrative
- Reconcile orphaned local opportunity records not found in CW during refresh
- Invalidate caches for removed orphaned opportunities
- Add reconciled event and orphanedCount to refresh events
- Update API_ROUTES.md with taxableFlag field documentation

src/modules/globalEvents.ts

@@ -171,11 +171,17 @@ interface EventTypes {
     totalDb: number;
     staleCount: number;
     itemsUpdated: number;
+    orphanedCount: number;
+  }) => void;
+  "cw:opportunities:refresh:reconciled": (data: {
+    orphanedCount: number;
+    removedCwIds: number[];
   }) => void;
   "cw:opportunities:refresh:skipped": (data: {
     totalCw: number;
     totalDb: number;
     staleCount: number;
+    orphanedCount: number;
   }) => void;
 
   // Cache Events