Registered custom AcBinaryHubProtocol as a singleton IHubProtocol
in PluginNopStartup.cs to enable efficient binary messaging
(via AcBinarySerializer) and eliminate JSON/Base64 overhead.
Updated SIGNALR_ENDPOINTS.md to document the new protocol,
noting WebSocket (TransferFormat.Binary) requirement and
affected hubs (DevAdminSignalRHub, LoggerSignalRHub).
Explicitly set StatefulReconnectBufferSize to 30 MB in both
code and documentation.