fix: 懒加载单例以修复环境变量加载问题

src/experimental/PFC/waiter.py

@@ -2,7 +2,7 @@ from src.common.logger import get_logger
 from .chat_observer import ChatObserver
 from .conversation_info import ConversationInfo
 
-# from src.individuality.individuality import individuality,Individuality # 不再需要
+# from src.individuality.individuality get_individuality,Individuality # 不再需要
 from src.config.config import global_config
 import time
 import asyncio