Update app.py

app.py

@@ -1,3 +1,6 @@
+# ------------------------------
+# Enhanced NeuroResearch AI System with Refinement Counter and Increased Recursion Limit
+# ------------------------------
 import logging
 import os
 import re
@@ -8,7 +11,7 @@ import sys
 from datetime import datetime
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from typing import List, Dict, Any, Optional, Sequence
-import chromadb
+
 import requests
 import streamlit as st