call_moderation_unauthorised· reason_code· applies to service_call, event_envelopeA v1 moderator action (kick / ban / end-for-all, via `ak.call.signal{moderation}` or a `ak.call.state` moderation field) was attempted by an actor lacking `ak.call.moderate`. Reducer / receiver MUST reject. Moderator force-mute is deferred in v1: a mute_state{by=moderator} is unsupported_feature and an ak.call.state mute_override is schema_violation before this authorization check.