I wrote that v0.55.1 was waiting in 516641b. It is not — cadvisor is not in this
compose file at all; it runs in the portainer stack next door, so nothing here
sets its version. The finding stands and the measurement stands, but the reason
attached to it was false, and a decision is only worth its reason.
Same shape as the portainer agent: measured, outside our deployment path, and
therefore dated with the others rather than with this week's rollout.