Get run

GET /api/v1/tasks/runs/{run_id}

{
  "run_id": "run_abc123...",
  "session_id": "uuid",
  "status": "succeeded",
  "model": "gpt-5.6-luna",
  "source": "api",
  "input": { "prompt": "...", "model": "..." },
  "output_text": "The answer is...",
  "output_structured": null,
  "error": null,
  "metadata": { "project": "demo" },
  "started_at": "2026-02-27T00:00:01.000Z",
  "finished_at": "2026-02-27T00:00:05.000Z",
  "created_at": "2026-02-27T00:00:00.000Z"
}