313-line walkthrough for adopting the `sunbeam.pt/*` label scheme on
existing manifests in sbbb. Documents the required labels, optional
annotations, virtual-service ConfigMap pattern, and the
multi-deployment grouping convention. Includes a complete table of
the 33 services with their target K8s resources and the values to put
on each. Teams onboarding new services can follow this without having
to read the registry source.