Body for closing a reconsideration request.It carries only a note, and that is the design rather than an omission. Closing a review
records that an admin handled it; it grants nothing (D15). A status field here would invite
exactly the conflation the table's COMMENT ON TABLE warns about — the admin's actual answer is
a separate POST /api/access/admin/principals/{id}/approve.
{
"decision_note": "string"
}