curl --request GET \
  --url https://app.autoposting.ai/api-proxy/agents/{agentId}/runs/{runId} \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "id": "run_01HXYZ",
    "agentId": "agent_01HXYZ",
    "status": "completed",
    "postsGenerated": 1,
    "tokensUsed": 850,
    "error": null,
    "startedAt": "2024-01-10T09:00:00Z",
    "completedAt": "2024-01-10T09:00:45Z"
  }
}