fix(memory): allow end user id keyword search

- Match keyword against end_user_id even when other_name exists
- Keep Neo4j and RAG end user list search behavior consistent

api/app/core/memory/storage_services/forgetting_engine/forgetting_scheduler.py

@@ -353,7 +353,7 @@ class ForgettingScheduler:
             return results[0]['total']
         return 0
     
-    async def _sync_memory_count_to_mysql(
+    async def _sync_memory_count_to_db(
         self,
         end_user_id: Optional[str] = None,
     ) -> None: