feat: make subscribe completion durable

app/startup/subscription.py

@@ -1,7 +1,7 @@
 """订阅写入事务适配器的启动装配。"""
 
 from collections.abc import Callable
-from contextlib import AbstractAsyncContextManager, asynccontextmanager
+from contextlib import AbstractAsyncContextManager, asynccontextmanager, contextmanager
 from datetime import datetime, timezone
 from typing import Any
 
@@ -20,6 +20,10 @@ from app.application.subscription.delete import (
     DeleteSubscribeCommand,
     configure_delete_subscribe_scope,
 )
+from app.application.subscription.complete import (
+    CompleteSubscriptionCommand,
+    configure_subscription_completion_scope,
+)
 from app.application.subscription.mutation import (
     SubscriptionMutationService,
     configure_subscription_mutation_scope,
@@ -28,6 +32,7 @@ from app.adapters.external.server import MoviePilotServerHelper
 from app.db.oper.subscribe import SubscribeOper
 from app.db.oper.subscribehistory import SubscribeHistoryOper
 from app.db.session import async_session_scope
+from app.db.session import SessionFactory
 from app.db.uow import SqlAlchemyAsyncUnitOfWork, SqlAlchemyUnitOfWork
 from app.startup.outbox import (
     SqlAlchemyAsyncOutboxStager,
@@ -133,6 +138,26 @@ async def _publish_deleted(payload: dict[str, Any]) -> None:
     await EventManager().async_send_event(EventType.SubscribeDeleted, payload)
 
 
+def _publish_completed(payload: dict[str, Any]) -> None:
+    """发布已提交的订阅完成事件。"""
+    EventManager().send_event(EventType.SubscribeComplete, payload)
+
+
+@contextmanager
+def subscription_completion_scope():
+    """为同步完成链创建独占 Session、UoW 与 durable outbox。"""
+    session = SessionFactory()
+    try:
+        yield CompleteSubscriptionCommand(
+            repository=SubscribeOper(session),
+            unit_of_work=SqlAlchemyUnitOfWork(session),
+            outbox=SqlAlchemyOutboxRepository(session),
+            publish=_publish_completed,
+        )
+    finally:
+        session.close()
+
+
 @asynccontextmanager
 async def subscription_mutation_scope():
     """为非 HTTP 入口创建独占订阅修改会话、UoW 与 outbox。"""
@@ -163,3 +188,4 @@ def configure_transactional_subscription_scopes() -> None:
     """登记 Agent 等非 HTTP 入口复用的订阅事务作用域。"""
     configure_subscription_mutation_scope(subscription_mutation_scope)
     configure_delete_subscribe_scope(delete_subscribe_scope)
+    configure_subscription_completion_scope(subscription_completion_scope)