merge: preserve existing business features on new foundation

app/worker/__main__.py

@@ -4,6 +4,7 @@ import logging
 
 from app.core.config import get_settings
 from app.infrastructure.db import engine
+from app.worker.offsite_mail_worker import OffsiteMailWorker
 from app.worker.runtime import WorkerRuntime
 
 logger = logging.getLogger(__name__)
@@ -12,10 +13,12 @@ logger = logging.getLogger(__name__)
 async def serve(*, once: bool = False) -> None:
     settings = get_settings()
     runtime = WorkerRuntime(settings=settings)
+    offsite_worker = OffsiteMailWorker(settings)
     try:
         while True:
             try:
                 worked = await runtime.run_once()
+                worked = await offsite_worker.run_once() or worked
             except Exception:
                 # 常驻 Worker 不能因为"某一轮"的异常就整体退出：数据库抖动、
                 # 迁移期间锁表、外部依赖瞬断都会命中这里，而 `run_once` 里的
@@ -31,6 +34,7 @@ async def serve(*, once: bool = False) -> None:
             if not worked:
                 await asyncio.sleep(settings.worker_poll_seconds)
     finally:
+        await offsite_worker.close()
         await engine.dispose()