feat:大幅优化聊天流控制，更精准简洁

src/chat/message_receive/message.py

@@ -108,6 +108,8 @@ class MessageRecv(Message):
         self.has_picid = False
         self.is_voice = False
         self.is_mentioned = None
+        self.is_at = False
+        self.reply_probability_boost = 0.0
         self.is_notify = False
 
         self.is_command = False