http://[...]/jobs/X endpoint doesn't have error information

[seamusabshere]

it shows status=error but doesn't provide any error details

[emk]

Yes, this is a good thing to tackle. See #32 for the tracking issue.

[emk]

Actually, now that we have the babysitter.rs code, we also have a case where a job can fail without any individual datum failures (for example, a zombie job). So we need to add job-level error handling, too.