feat(auth): support trusted device (#52)

New API to maintain sessions and devices:

- GET /api/private/admin/sessions
- DELETE /api/private/admin/sessions/{session_id}
- GET /api/private/admin/trusted-devices
- DELETE /api/private/admin/trusted-devices/{device_id}

Auth:

web clients request `/oauth/token` and `/api/v2/session/verify` with `X-UUID` header to save the client as trusted device.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

app/router/private/__init__.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from app.config import settings
 
-from . import audio_proxy, avatar, beatmapset, cover, oauth, relationship, score, team, username  # noqa: F401
+from . import admin, audio_proxy, avatar, beatmapset, cover, oauth, relationship, score, team, username  # noqa: F401
 from .router import router as private_router
 
 if settings.enable_totp_verification: