Broadcast a new values snapshot to every napplet with an active
config.subscribe. Each subscriber receives a config.values envelope
with no id (push form per wire spec — absence of id distinguishes
push from correlated config.get response).
The new configuration snapshot (full object, not a diff)
NAP-CONFIG reference service bundle —
handlerto register with the runtime,publishValuesfor the host app to push updates live to all subscribed napplets.