curl --request GET \
  --url https://api.evolink.ai/v1/tasks/{task_id} \
  --header 'Authorization: Bearer <token>'

{
  "created": 1756817821,
  "id": "task-unified-1756817821-4x3rx6ny",
  "model": "gemini-3.1-flash-image-preview",
  "object": "image.generation.task",
  "progress": 100,
  "results": [
    "http://example.com/image.jpg"
  ],
  "status": "completed",
  "error": {
    "code": "content_policy_violation",
    "message": "Content policy violation.\nYour request was blocked by safety filters.",
    "type": "task_error"
  },
  "task_info": {
    "can_cancel": false
  },
  "type": "image"
}