refactor: unify agent data port access

app/agent/tools/impl/add_subscribe.py

@@ -7,7 +7,7 @@ from pydantic import BaseModel, Field
 from app.agent.tools.base import MoviePilotTool
 from app.agent.tools.tags import ToolTag
 from app.chain.subscribe import SubscribeChain
-from app.application.agentdata import UserPort as UserOper
+from app.application.agentdata import get_agent_user_port
 from app.runtime.log import logger
 from app.schemas.types import MUSIC_ENTITY_ALBUM, MediaSource, MediaType, NotificationChannel
 from app.domain.media import normalize_music_type
@@ -154,7 +154,7 @@ class AddSubscribeTool(MoviePilotTool):
 
         mapped_username = await self.run_blocking(
             "db",
-            UserOper().get_name,
+            get_agent_user_port().get_name,
             **{key: self._user_id for key in binding_keys},
         )
         return mapped_username or resolved_username