perf(methods): 通过移除不必要的 self 参数优化方法签名

在包括 chat、plugin_system、schedule 和 mais4u 在内的多个模块中，消除冗余的实例引用。此次改动将无需访问实例状态的实用函数转换为静态方法，从而提升了内存效率，并使方法依赖关系更加清晰。

src/chat/heart_flow/heartflow_message_processor.py

@@ -1,21 +1,20 @@
 import asyncio
-import re
 import math
+import re
 import traceback
-from datetime import datetime
-
 from typing import Tuple, TYPE_CHECKING
 
-from src.config.config import global_config
+from src.chat.heart_flow.heartflow import heartflow
 from src.chat.memory_system.Hippocampus import hippocampus_manager
 from src.chat.message_receive.message import MessageRecv
 from src.chat.message_receive.storage import MessageStorage
-from src.chat.heart_flow.heartflow import heartflow
-from src.chat.utils.utils import is_mentioned_bot_in_message
-from src.chat.utils.timer_calculator import Timer
 from src.chat.utils.chat_message_builder import replace_user_references_sync
+from src.chat.utils.timer_calculator import Timer
+from src.chat.utils.utils import is_mentioned_bot_in_message
 from src.common.logger import get_logger
+from src.config.config import global_config
 from src.mood.mood_manager import mood_manager
+from src.person_info.relationship_manager import get_relationship_manager
 
 if TYPE_CHECKING:
     from src.chat.heart_flow.sub_heartflow import SubHeartflow