Harden auth and persist report schedules

app/main.py

@@ -20,6 +20,7 @@ from app.api.v1.session import (
     admin_router as adaptive_admin_router,
     router as adaptive_session_router,
 )
+from app.core.rate_limit import close_rate_limit
 from app.admin_web import (
     configure_admin_web,
     router as admin_web_router,
@@ -86,6 +87,7 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
     # Shutdown: Close database connections
     if settings.ENABLE_ADMIN:
         await shutdown_admin_web()
+    await close_rate_limit()
     await close_db()