Update observability_router.py

observability_router.py

@@ -5,7 +5,7 @@ from io import StringIO
 from fastapi import APIRouter, HTTPException
 from fastapi.responses import StreamingResponse
 from pydantic import BaseModel
-from typing import List, Dict, Optional
+from typing import List, Dict, Optional, Any
 from observability import LLMObservabilityManager