Listar checkpoints de entrenamiento

curl https://api.fastino.ai/v1/training-jobs/YOUR_TRAINING_JOB_ID/checkpoints \
  -H "X-API-Key: $FASTINO_API_KEY"

{
  "success": true,
  "checkpoints": [
    {
      "id": "CHECKPOINT_ID",
      "job_id": "YOUR_TRAINING_JOB_ID",
      "epoch": 5,
      "step": 500,
      "training_loss": 0.12,
      "validation_loss": 0.18,
      "is_deployable": true,
      "is_best": true,
      "is_final": true,
      "created_at": "2026-09-22T20:30:00Z",
      "updated_at": "2026-09-22T20:30:00Z"
    }
  ],
  "count": 1
}