expert (E1): a week of the observability queue on a large legacy Prometheus/Alertmanager repo, graded by…

expert (E1): a week of the observability queue on a large legacy Prometheus/Alertmanager repo, graded by…: a task in 3ambench (Harbor dataset). Context: storefront split on the 23rd. promo-worker now belongs to growth (see teams/ownership.yaml ). Two of the tickets below come from that.