Update app.py

app.py

@@ -1,8 +1,3 @@
-from openrouter_llm import OpenRouterFreeAdapter, OpenRouterFreeChain
-from langchain.schema import Document as LangchainDocument
-from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.vectorstores import FAISS
 import os
 import uuid
 import shutil
@@ -10,6 +5,12 @@ import logging
 from typing import List, Optional, Dict, Any
 from pathlib import Path
 
+
+from langchain.schema import Document as LangchainDocument
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain.embeddings import HuggingFaceEmbeddings
+from langchain.vectorstores import FAISS
+
 import fitz  # PyMuPDF
 import markdown
 from fastapi import FastAPI, File, UploadFile, HTTPException, Form, Depends, BackgroundTasks
@@ -18,6 +19,8 @@ from fastapi.responses import JSONResponse
 from pydantic import BaseModel
 from dotenv import load_dotenv
 
+from openrouter_llm import OpenRouterFreeAdapter, OpenRouterFreeChain
+
 # Load environment variables
 load_dotenv()