Get Metrics Summary For All Splits

curl --request GET \
  --url https://api.landing.ai/v1/projects/{project_id}/train/{training_id}/results/metrics

{
  "data": [
    {
      "name": "<string>",
      "classes": [
        {
          "id": 123,
          "performance": 123,
          "recall": 123,
          "precision": 123
        }
      ],
      "metrics": [
        {
          "name": "<string>",
          "performance": 123,
          "recall": 123,
          "precision": 123
        }
      ]
    }
  ]
}