A non-AIError from transcribe/summarize (av.InvalidDataError on corrupt
audio, seen live with 'My recording 63') escaped the consumer, left the
row 'running', and got requeued at every engine restart forever. Both
runners now catch it, fail the row with the exception type in the
message, and keep a usable transcript (summarize completes with a
'Summary failed' note). Regression tests pin both paths (proven red
without the fix).
514d75fe92