2nd fixes to /upload

app.py

@@ -152,6 +152,7 @@ async def upload_file(file: UploadFile = File(...)):
 
     SESSION_DATA[session_id] = {
         "filename": file.filename,
+        "chunks": text_chunks,
         "index": faiss.write_index_buf(index), # Store the index as bytes
     }