expert (E3): a week of the observability queue on a large legacy Prometheus/Alertmanager repo, graded by…

expert (E3): a week of the observability queue on a large legacy Prometheus/Alertmanager repo, graded by…: a task in 3ambench (Harbor dataset). A couple of tickets this week are fallout from the playback split on the 17th: receipts-mailer went to the new subscriptions team. The rest is the usual.