add timestamp when seach occured and search time in logging

app.py

@@ -1,6 +1,5 @@
-import os
-import time
-import subprocess
+import os, subprocess, time, pytz
+from datetime import datetime
 from fastapi import FastAPI
 
 from langchain_community.vectorstores import Chroma
@@ -71,9 +70,15 @@ def rag_with_reranking(query : str):
 def search_text(query):
     """Searches for similar texts."""
 
+    tz = pytz.timezone('Asia/Bangkok')  # GMT+7
+    now = datetime.now(tz)
+    print(f"{now.strftime('%Y-%m-%d %H:%M:%S')}")
     print(f"Searching for: {query}")
 
+    start = time.time()
     results = rag_with_reranking(query)
+    end = time.time()
+    print("Search Time:", end - start, "seconds")
 
     lst = []
     for doc in results: