slo-onboarding (medium): 9 change requests on a Prometheus/Alertmanager repo, graded by promtool/amtool…

slo-onboarding (medium): 9 change requests on a Prometheus/Alertmanager repo, graded by promtool/amtool…: a task in 3ambench (Harbor dataset). What the agent is asked, how it is graded, what it runs in, and its files.