refactor: migrate high-risk write transactions

app/application/plugin/data.py

@@ -0,0 +1,45 @@
+"""插件持久化数据写用例。"""
+
+from typing import Protocol
+
+
+class PluginDataMutationRepository(Protocol):
+    """插件数据删除命令所需的无提交仓储端口。"""
+
+    def stage_delete(self, plugin_id: str) -> None:
+        """暂存目标插件的全部持久化数据删除。"""
+        ...
+
+
+class UnitOfWork(Protocol):
+    """插件数据同步写用例所需的事务端口。"""
+
+    def commit(self) -> None:
+        """提交当前逻辑操作。"""
+        ...
+
+    def rollback(self) -> None:
+        """回滚当前逻辑操作。"""
+        ...
+
+
+class DeletePluginDataCommand:
+    """在一个显式事务中删除目标插件的全部持久化数据。"""
+
+    def __init__(
+        self,
+        repository: PluginDataMutationRepository,
+        unit_of_work: UnitOfWork,
+    ) -> None:
+        """保存无提交仓储和事务所有者。"""
+        self._repository = repository
+        self._unit_of_work = unit_of_work
+
+    def execute(self, plugin_id: str) -> None:
+        """暂存并提交删除；任一步失败时回滚并传播原异常。"""
+        try:
+            self._repository.stage_delete(plugin_id)
+            self._unit_of_work.commit()
+        except Exception:
+            self._unit_of_work.rollback()
+            raise