curl --request GET \
  --url http://localhost/public/v1/email/events/{event_id}

{
  "ok": true,
  "event": {
    "id": "<string>",
    "event_name": "<string>",
    "occurred_at": "<string>",
    "idempotency_key": "<string>",
    "email": "<string>",
    "payload": "<string>",
    "duplicate_of": "<string>",
    "failure_reason": "<string>",
    "created_at": "<string>",
    "completed_at": "<string>"
  }
}