Remove ALL registrations for a subscriber (every channel + LXMF).
Exports all registrations as serializable records. Used by the
@reticulum/node FS adapter (Rust ~/.rfed/notify_registrations.rmp).
All registrations for (subscriber, channel). channelHash === null
matches LXMF/global registrations; pass a 16-byte hash for a channel.
Replaces the registry with the given records (direct population, used on load).
Register or refresh a relay for (subscriber, channel). channelHash is
null for LXMF propagation; a 16-byte hash for a specific channel.
Remove a specific (subscriber, channel, relay) registration.
Per-node notify registration table. Maps
(subscriber_hash, channel_hash|null, relay_hash)triples. Never synced between peers (RustNotifyRegistry); persistence is a runner concern.