diff --git a/app/application/subscription/complete.py b/app/application/subscription/complete.py
index 19e174fff..563b96457 100644
--- a/app/application/subscription/complete.py
+++ b/app/application/subscription/complete.py
@@ -9,8 +9,8 @@ from typing import Any, Protocol
 
 from app.application.outbox import (
     OUTBOX_LEASE_SECONDS,
-    OutboxIntent,
     SUBSCRIBE_COMPLETED_TOPIC,
+    OutboxIntent,
     SyncOutboxTransaction,
     SyncUnitOfWork,
 )
diff --git a/docs/adr/0007-background-action-reliability.md b/docs/adr/0007-background-action-reliability.md
index e234557b9..9c025b810 100644
--- a/docs/adr/0007-background-action-reliability.md
+++ b/docs/adr/0007-background-action-reliability.md
@@ -54,7 +54,8 @@ Event Contract Registry 是 53 个事件的逐项机器清单。下表按相同
   通知和服务端上报必须由同事务 durable intent 驱动。ARCH-251 首选 `SubscribeAdded` pilot。
 - `DownloadAdded`：下载器确认接收后，下载历史与事件 intent 已在返回前原子提交；通知和模块后处理只在
   commit 后启动，事件由 Outbox 恢复投递。
-- `TransferComplete`、`TransferFailed` 以及对应的字幕、音频完成/失败事件：整理步骤本身属于 E3，
+- `TransferComplete`、`TransferFailed`、`SubtitleTransferComplete`、`SubtitleTransferFailed`、
+  `AudioTransferComplete`、`AudioTransferFailed`：整理步骤本身属于 E3，
   但历史行提交后向事件消费者发布结果属于 E2，使用同一 JSON 快照与恢复 handler。
 
 ## 非 Event 后台机制映射
diff --git a/tests/test_cleanup_index_migration.py b/tests/test_cleanup_index_migration.py
index b95892653..bff07d3cd 100644
--- a/tests/test_cleanup_index_migration.py
+++ b/tests/test_cleanup_index_migration.py
@@ -6,7 +6,6 @@ import sqlalchemy as sa
 from alembic.migration import MigrationContext
 from alembic.operations import Operations
 
-
 MIGRATION_MODULE = "database.versions.a6c8e2f4b1d3_3_0_11"
 INDEXES = {
     "subscribehistory": (