### Quantum Studio: a run on the job service whose answer is lost is sent again, safely

- **Quantum Studio:** a run on the job service goes under an `Idempotency-Key` of its own, a random UUID, to a
  service whose description says it keeps keys. Where no answer comes back, the run is sent again under that key,
  twice at most, so a job the service took is answered rather than taken twice. A service that keeps no keys is sent
  no key, which it would refuse across origins, and no job twice. A poll whose answer is lost no longer ends the
  wait; five in a row do.

