/api/v1/environments/{id}

Moves the environment to stopping (202) and reclaims the carrier asynchronously; the

final stopped state is confirmed via GET or events. Repeating the same request with

the same Idempotency-Key returns the same result. Rows stay readable after destroy

(Gate A does not purge environment rows); a re-create yields a new env_ id. Operator

face: principal sessions are denied 403 / 404 not_owned.