Alert if something goes wrong with the Internet Archive task count #3413
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ENG-417
Something got scrambled, back in July, with Perma's internal record of how many Internet Archive tasks we currently have in flight: we think things got out-of-whack during a phased reboot of the workers.
Our records ended up in a state where, we thought we had more tasks in flight than is permitted, and so, we refrained from making any more uploads since.
We don't think this will happen again, because of a change in strategy: we will now go into maintenance mode before making changes like this.
But, this PR adds another level of safety: if we get into the same situation again, the upload task will now log to the error log.