Retrieves a pulse

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

{
  "data": {
    "id": "11acb29c-9366-4a8c-a9f4-94aba0ec0371",
    "type": "pulses",
    "attributes": {
      "short_id": null,
      "source": "unknown",
      "summary": "Sunt qui officiis dolor.",
      "labels": [],
      "refs": [],
      "services": [],
      "environments": [],
      "data": {},
      "external_url": null,
      "started_at": "2026-01-06T11:24:28.572-08:00",
      "ended_at": null,
      "created_at": "2026-01-06T11:24:28.572-08:00",
      "updated_at": "2026-01-06T11:24:28.572-08:00"
    }
  }
}