[RAG] 全部LLM硬编码从deepseek-r1改为deepseek-v3；修复知识库问答source格式不匹配导致检索结果被丢弃

langchain-chat/server/chat/chat_comparison.py

@@ -46,7 +46,7 @@ async def chat_comparison_test(
                 executor.submit(
                     get_llm_model_response,
                     strategy_name="query rewrite",
-                    llm_model_name=LLM_MODELS[1],
+                    llm_model_name=LLM_MODELS[0],
                     template_prompt_name="extract_key_points",
                     prompt_param_dict={"time": datetime.now().strftime("%Y%m%d"), "context": context, "content": content},
                     temperature=0.01,