RemotePlayerRegistry
Caches proxy-wide player presence (player name -> server name) on this Paper server.
Velocity is the source of truth; this registry is replaced wholesale on each dev.m1sk9.lunaticChat.engine.protocol.PluginMessage.PresenceSnapshot. It backs cross-server direct message tab-completion and remote target resolution.
Parameters
localServerName
This server's name (as configured in velocityIntegration.serverName), used to exclude local players from remote lookups.