Consumer half of ruling eureka-body:ruling:addressed-delivery-only. A delivery is for a Persona when it is a message and Matrix says
direct/tag/reply, or its mentions or text name her (address::is_for); notices, edits, @room and a nil basis (unproven) wake no one on
their own. The heartbeat's off-beat wake keeps its sender gate. The Persona acks the leading run of what is not hers in one ack and a
live session is told only what is hers. A mouth that does not serve the v2 request is asked the v1 way. Golden bytes pinned from Bifrost
tests/fixtures/persona-chat-v5; the public-surface snapshot is regenerated.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>