Update app.py

app.py

@@ -12,8 +12,7 @@ import google.generativeai as genai
 from functools import lru_cache
 from tenacity import retry, stop_after_attempt, wait_exponential
 from langchain_community.retrievers import BM25Retriever
-from langchain_community.vectorstores import
- FAISS
+from langchain_community.vectorstores import FAISS
 from langchain_core.embeddings import Embeddings
 from langchain_core.documents import Document
 from collections import defaultdict
@@ -26,6 +25,7 @@ load_dotenv()
 # --- Configuration ---
 FAISS_INDEX_PATH = "faiss_index"
 BM25_INDEX_PATH = "bm25_index.pkl"
+
 CACHE_VERSION = "v1"
 embedding_model = "e5-mistral-7b-instruct"
 generation_model = "gemini-1.5-flash"