fix: set default factory for extract_by in ListOperatorNodeData (#10561)

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

@@ -59,4 +59,4 @@ class ListOperatorNodeData(BaseNodeData):
     filter_by: FilterBy
     order_by: OrderBy
     limit: Limit
-    extract_by: ExtractConfig
+    extract_by: ExtractConfig = Field(default_factory=ExtractConfig)