Update dialogue_manager: reduce dialogue log

dialogue_manager.py

@@ -703,8 +703,8 @@ class DialogueManager:
             消息列表
         """
         dialogue_history = self.history_dialogue_service.get_dialogue_history(self.staff_id, self.user_id)
-        logger.debug("staff[{}], user[{}], dialogue_history: {}".format(
-            self.staff_id, self.user_id, dialogue_history
+        logger.debug("staff[{}], user[{}], recent dialogue_history: {}".format(
+            self.staff_id, self.user_id, dialogue_history[-20:]
         ))
         messages = []
         config = {