feat(agent_node): ensure that the enum-checking syntax is compatible with Python 3.11. (#20373)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/workflow/nodes/agent/agent_node.py

@@ -356,7 +356,9 @@ class AgentNode(ToolNode):
 
     def _remove_unsupported_model_features_for_old_version(self, model_schema: AIModelEntity) -> AIModelEntity:
         if model_schema.features:
-            for feature in model_schema.features:
-                if feature.value not in AgentOldVersionModelFeatures:
+            for feature in model_schema.features[:]:  # Create a copy to safely modify during iteration
+                try:
+                    AgentOldVersionModelFeatures(feature.value)  # Try to create enum member from value
+                except ValueError:
                     model_schema.features.remove(feature)
         return model_schema

api/core/workflow/nodes/agent/entities.py

@@ -1,4 +1,4 @@
-from enum import Enum
+from enum import Enum, StrEnum
 from typing import Any, Literal, Union
 
 from pydantic import BaseModel
@@ -26,7 +26,7 @@ class ParamsAutoGenerated(Enum):
     OPEN = 1
 
 
-class AgentOldVersionModelFeatures(Enum):
+class AgentOldVersionModelFeatures(StrEnum):
     """
     Enum class for old SDK version llm feature.
     """