The build agent declares neither the retired builder's npm-password own-secret
nor a serves setting, so the packages step handed its credential to nothing
and genesis's sdk step had no way to publish. The packages step now seals the
genesis-package-registry own-secret to build-agent: the forge on this node's
loopback, the port given for the package registry, its npm path, and the
mesh-builder account with its password. setFoundationSettings no longer gives
the builder a serves.port.