agent-platform release v4.12.1

muster-valkey gets the memory a grown token store needs (valkey.valkey.resources: requests 256Mi, limits 1Gi, from 64Mi / 256Mi). Valkey loads the whole RDB into memory on every start; gazelle’s store held 247 MB after three weeks and every restart under the 256Mi limit was OOM-killed — when 4.12.0 rolled the pod once for the new annotation, muster’s token endpoint stayed down for five minutes until the limit was raised by hand. UPGRADE.md carries the recognition and the recovery.