Success path deletes both the upload and the WAV; failures are typed and still
delete the audio; a shutdown mid-job leaves the row for the start-up sweep
(it is not a transcription failure); a hung endpoint is failed by the job
timeout, never an eternal spinner; strictly one job at a time (two long jobs on
iguana were never measured); stopping deletes queued audio and refuses new jobs.
Red: uploads.Worker is undefined.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
