test: added test for core token buffer memory and model runtime (#32512)

Co-authored-by: rajatagarwal-oss <rajat.agarwal@infocusp.com>

api/dify_graph/model_runtime/entities/message_entities.py

@@ -276,7 +276,4 @@ class ToolPromptMessage(PromptMessage):
 
         :return: True if prompt message is empty, False otherwise
         """
-        if not super().is_empty() and not self.tool_call_id:
-            return False
-
-        return True
+        return super().is_empty() and not self.tool_call_id