GET /bai_milestones/?format=api&ordering=-updated_at
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 0,
    "next": null,
    "previous": null,
    "results": []
}
If True, advanced milestones in same area may be skipped if this is NOT_YET
Optional 1–5 scale