Retrieves a heartbeat

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

{
  "data": {
    "id": "460654d1-e89d-4721-9288-3bf66d0af4b5",
    "type": "heartbeats",
    "attributes": {
      "slug": "molestias-autem-sunt-corrupti",
      "name": "Molestias autem sunt corrupti.",
      "description": "Sunt hic quaerat porro.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "11ccdc83-9b81-430f-aee6-8fe02a420b26",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "570",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/460654d1-e89d-4721-9288-3bf66d0af4b5/ping",
      "secret": "heartbeat_2317e9f49f3b08a6e033b637ec803a41793e4b54b4ee24755602aa99c6a81699",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-02-13T18:07:18.578-08:00",
      "created_at": "2026-02-13T18:07:18.578-08:00"
    }
  }
}