fix: import Any for persistence module

api/persistence.py

@@ -17,7 +17,7 @@ Required Supabase tables (run backend/migrations/s359_task_persistence.sql once)
 """
 import asyncio, time, json
 from .state import safe_json_dumps as _sjd  # B11-FIX: surrogate-safe drop-in
-from typing import Optional
+from typing import Optional, Any
 
 import logging
 _logger = logging.getLogger("api.persistence")