Update main.py

main.py

@@ -1,7 +1,7 @@
 ## Digiyatra
 from fastapi import FastAPI, Depends, BackgroundTasks, HTTPException, APIRouter, Query, Header
 from pydantic import BaseModel
-from typing import List, Dict, Optional, Union, Annotated, Any
+from typing import List, Dict, Optional, Union, Annotated, Any, get_args
 from openai import AsyncOpenAI
 from observability import LLMObservabilityManager, log_execution, logger
 from aiclient import DatabaseManager, AIClient