fix(agent): import Any for tool event helper (#5735)

src/agent_loop.py

@@ -12,7 +12,7 @@ import json
 import re
 import time
 import logging
-from typing import AsyncGenerator, List, Dict, Optional, Set
+from typing import Any, AsyncGenerator, List, Dict, Optional, Set
 from urllib.parse import urlparse
 
 from src.llm_core import (