Fix/shared lock (#210)

api/core/conversation_message_task.py

@@ -171,7 +171,7 @@ class ConversationMessageTask:
         )
 
         if not by_stopped:
-            self._pub_handler.pub_end()
+            self.end()
 
     def update_provider_quota(self):
         llm_provider_service = LLMProviderService(
@@ -268,6 +268,9 @@ class ConversationMessageTask:
         total_price = message_tokens_per_1k * message_unit_price + answer_tokens_per_1k * answer_unit_price
         return total_price.quantize(decimal.Decimal('0.0000001'), rounding=decimal.ROUND_HALF_UP)
 
+    def end(self):
+        self._pub_handler.pub_end()
+
 
 class PubHandler:
     def __init__(self, user: Union[Account | EndUser], task_id: str,