POST /v2/custodian-authorities/:id/consent

Submit a signed consent JWT for a custodian authority that has
status `waiting-for-consent` (i.e. all required files have been
uploaded). The exact JWT shape is custodian-specific — see the
public docs for the per-custodian consent flow.

Path params:
  id (required) — Custodian-authority identifier (UUID).

Request:
{
  "data": {
    "type": "custodian-authority-consent",
    "attributes": {
      "consentJwt": "string (required) — signed JWT; the `files` claim
                     references uploaded files by hash"
    }
  }
}

Response (204 No Content):
  Empty body.

After submission the authority's status moves to `awaiting-aleta`.