Unpaused
Sent by the host to every other member when a paused member's link recovered inside its reconnect window — the release counterpart of Paused (#1557).
On receipt a member restores us.tractat.kuilt.session.Liveness.Connected for peerId and emits us.tractat.kuilt.session.MembershipEvent.Recovered. Idempotent — a no-op when the member is not currently paused. Host-authoritative, like Paused.
peerId — the recovered member's us.tractat.kuilt.core.PeerId value.