refactor: 收口订阅与插件应用边界

app/sdk/_legacy/subscribe.py

@@ -2,7 +2,7 @@
 
 from typing import Any, Optional
 
-from app.application.subscribe import add_subscribe, async_add_subscribe
+from app.application.subscription.write import add_subscribe, async_add_subscribe
 from app.db.models.subscribe import Subscribe
 from app.db.oper.subscribe import SubscribeOper as CanonicalSubscribeOper
 from app.domain.context import MediaInfo, MusicInfo