curl --request GET \
  --url https://api.trulayer.ai/v1/eval-runs/{id}/diff \
  --header 'Authorization: Bearer <token>'

{
  "run_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "baseline_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "summary": {
    "mean_delta": 123,
    "improved_count": 123,
    "regressed_count": 123,
    "unchanged_count": 123
  },
  "items": [
    {
      "trace_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "delta": 123,
      "label": "<string>",
      "baseline_score": 123,
      "run_score": 123,
      "baseline_rationale": "<string>",
      "run_rationale": "<string>"
    }
  ]
}