curl --request DELETE \
  --url https://aarwcjjzhlmkgdwrisyt.supabase.co/functions/v1/milestone-cancel \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "status": 123,
  "error": "<string>",
  "details": [
    {
      "field": "<string>",
      "message": "<string>"
    }
  ]
}