fixed windows error

app.py

@@ -1,7 +1,13 @@
 import os
+import sys
+import asyncio
 
 os.environ["NUMEXPR_MAX_THREADS"] = "12"
 
+# Fix for Windows asyncio compatibility with psycopg
+if sys.platform == 'win32':
+    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
+
 from fastapi import FastAPI, HTTPException, Depends, Body, status, Response
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.openapi.models import OAuthFlows as OAuthFlowsModel

modules/features/chatBot/utils/checkpointer.py

@@ -1,8 +1,17 @@
 """PostgreSQL checkpointer utilities for LangGraph memory."""
 
+import sys
+import asyncio
 import logging
 from typing import Optional
 
+# Fix for Windows asyncio compatibility with psycopg (backup in case app.py fix didn't apply)
+if sys.platform == 'win32':
+    try:
+        asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
+    except RuntimeError:
+        pass  # Already set
+
 from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
 from psycopg_pool import AsyncConnectionPool
 from psycopg.rows import dict_row

requirements.txt

@@ -1,5 +1,5 @@
 ## Web Framework & API
-fastapi==0.104.1
+fastapi==0.115.0  # Upgraded for Pydantic v2 compatibility
 websockets==12.0
 uvicorn==0.23.2
 python-multipart==0.0.6