curl --request PATCH \
  --url https://hireloam.com/api/v1/applications/{id}/stage \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "stage_id": "660e8400-e29b-41d4-a716-446655440001"
}
'

{
  "application": {
    "id": "<string>",
    "stage": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "order_index": 123
    }
  }
}