Update app.py

app.py

@@ -352,7 +352,7 @@ def retrieve_chunks(question: str, top_k: int = 20) -> list:
         retrieved_nodes = query_engine.retriever.retrieve(question)
         log_message(f"Получено {len(retrieved_nodes)} узлов")
 
-        rerank_threshold = retrieval_params['rerank_threshold']
+        rerank_threshold = retrieval_params.get('rerank_threshold', 0.5)
 
         reranked_nodes = rerank_nodes(
             question,