OptionalConfirmationThe note sent after a confirmation frame — a literal string, or a function of the change id.
Default: a structured frame_confirmed note carrying a do-not-narrate instruction. The Whiteboard
passes its original wording to stay byte-for-byte what it was.
OptionalStartAlso start the shared bridge's fixed-rate poller (1 fps) once the video track is up.
Default false: the pump is purely change-driven. This exists ONLY so the Whiteboard keeps the
behavior it had before the pump was lifted: it has always started the bridge's poller (which
re-sends the board every second regardless of change) despite its own comments and design
stating it is heartbeat-free. Nothing new should set this.
Options for BaseRealtimeChannelClient.EnableVisualPerception.