* BUG SYMPTOM: phoneNumberRegistrar.destroy is hanging while trying to
  destroy the channel
* CAUSE: not clear but likely something going on with deadlock. we'd
  assumed it was something to do with the call to `channel.destroy`,
  but perhaps it is in fact to do with the call to
  `eventsRepository.log`, which was passing `transaction` as an
  attribute to the event it was creating, and not as an option
* FIX: try correcting the syntax to see if it elimiantes the timeout