Relays may support notifying clients when all stored events have been sent.
If a relay supports this NIP, the relay SHOULD send the client a `EOSE` message in the format `["EOSE", <subscription_id>]` after it has sent all the events it has persisted and all the events that come after this message are newly published.
If a relay supports this NIP, the relay SHOULD send the client a `EOSE` message in the format `["EOSE", <subscription_id>]` after it has sent all the events it has persisted and it indicates all the events that come after this message are newly published.