feat: add llm_endpoint, llm_api_key, llm_model to QueryRequest

app.py

@@ -35,6 +35,9 @@ class QueryRequest(BaseModel):
     top_k: Optional[int] = 5
     rerank: Optional[bool] = True
     use_web: Optional[bool] = False
+    llm_endpoint: Optional[str] = None
+    llm_api_key: Optional[str] = None
+    llm_model: Optional[str] = None
 
 class QueryResponse(BaseModel):
     answer: str