Agent Node fails with PluginNotFoundError when using Workflow-as-Tool after upgrade from 1.9.1 to 1.12.1

这是 Dify 1.12.1 的已知 Bug,Agent 节点使用工作流工具(Workflow-as-Tool)时,因工作流图 JSON 中缺少 type 字段,工具被错误归类为 BUILT_IN 插件并在插件守护进程中查找失败。优先排查工作流图 JSON 中该工具的配置是否包含 type: wor


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