A swarm-ci-metrics host unit on a 5-minute timer lists every forge
repo's Actions runs as the new read-only ci-metrics account and pushes
each finished run's duration and queue wait over OTLP, stamped at the
run's stop time. The first pass backfills from run 1. swarm-controller
mints the account's token into bao and keeps a ci-metrics team with
read on the Actions unit in every organisation.
Closes#5376
