Get one takedown request that Doppel filed, by its own ID. Use this to resolve a request ID you already hold, for example one returned by GET /alert/takedown-requests.

The response repeats every field of the list route and adds alert_id, the alert the request was filed for, and activity, the request's history of status changes and platform emails, oldest first.
The organization is determined from the org_id claim in the JWT.