refactor(logging): introduce centralized logging and FastAPI lifespan

haystack_rag/main.py

@@ -1,11 +1,15 @@
 # main.py
 import sys
+import logging
 from haystack import Document
 
 # 需要 OpenAIDocumentEmbedder 来嵌入要写入的文档
 from haystack.components.embedders import OpenAIDocumentEmbedder
 from haystack.utils import Secret
 
+# 设置logger
+logger = logging.getLogger(__name__)
+
 # 导入所需的配置和构建函数
 from config import (
     DEFAULT_USER_ID,
@@ -130,7 +134,7 @@ def run_chat_session(user_id: str):
                 print(f"Chatbot: {answer} (Tokens: {total_tokens})")
             else:
                 print("Chatbot: Sorry, I couldn't generate an answer for that.")
-                print("Debug Info (Pipeline Results):", results)  # 打印完整结果以供调试
+                logger.debug(f"Pipeline Results: {results}")  # 记录调试信息
 
         except KeyboardInterrupt:
             print("\nExiting chat session. Goodbye!")