curl https://api.getspine.ai/v1/run/<run_id> \
  -H "X-API-KEY: sk_spine_..."

{
  "success": true,
  "data": {
    "run_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "canvas_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "progress": {
      "tasks_completed": 123,
      "tasks_total": 123,
      "elapsed_ms": 123
    },
    "duration_ms": 123,
    "result": {
      "final_output": "<string>",
      "artifacts": [
        {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "type": "docx",
          "name": "Q1_Report.docx",
          "download_url": "<string>",
          "size_bytes": 123
        }
      ]
    },
    "metadata": {
      "models_used": [
        "anthropic/claude-sonnet-4-6"
      ],
      "credits_consumed": 123
    },
    "errors": [
      {
        "error": "<string>"
      }
    ]
  }
}