Retrieves an alert group

curl --request GET \
  --url https://api.rootly.com/v1/alert_groups/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "1402de30-60fe-4318-9f4b-2f18c21d6d6f",
    "type": "alert_groups",
    "attributes": {
      "name": "123 test group",
      "slug": "123-test-group",
      "description": null,
      "time_window": 10,
      "condition_type": "any",
      "deleted_at": null,
      "created_at": "2025-12-17T11:01:54.656-08:00",
      "updated_at": "2025-12-17T11:01:54.656-08:00",
      "group_by_alert_title": false,
      "group_by_alert_urgency": false,
      "targets": [
        {
          "id": "27e7bb45-4426-4de0-966c-edffb9236e88",
          "alert_group_id": "1402de30-60fe-4318-9f4b-2f18c21d6d6f",
          "created_at": "2025-12-17T11:01:54.659-08:00",
          "deleted_at": null,
          "target_id": "48b6a9b7-2cae-4d16-b65f-673844237623",
          "target_type": "Service",
          "updated_at": "2025-12-17T11:01:54.659-08:00"
        }
      ],
      "attributes": []
    }
  }
}