curl --request GET \
  --url https://api.tokenfactory.nebius.com/v1/fine_tuning/jobs/{job_id}/checkpoints \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "created_at": 123,
      "fine_tuned_model_checkpoint": "<string>",
      "fine_tuning_job_id": "<string>",
      "metrics": {
        "full_valid_loss": 123,
        "full_valid_mean_token_accuracy": 123,
        "step": 123,
        "train_loss": 123,
        "train_mean_token_accuracy": 123,
        "valid_loss": 123,
        "valid_mean_token_accuracy": 123
      },
      "object": "fine_tuning.job.checkpoint",
      "step_number": 123,
      "result_files": [
        "<string>"
      ]
    }
  ],
  "object": "list",
  "first_id": "<string>",
  "last_id": "<string>",
  "has_more": false
}