refactor: 收口 V3 分层架构与插件兼容边界

app/workflow/actions/invoke_plugin.py

@@ -1,7 +1,7 @@
 from pydantic import Field
 
 from app.workflow.actions import BaseAction
-from app.runtime.extensions.plugin_manager import PluginManager
+from app.application.plugin.runtime import get_plugin_manager as PluginManager
 from app.runtime.log import logger
 from app.schemas.workflow import ActionParams
 from app.schemas.workflow import ActionContext