* rtc: broadcast an unlabeled data message from a source identity
BroadcastDataMessageForRoomFrom takes the source ID and identity instead
of a LocalParticipant, so a caller can stamp the sender of a message
whose source is not on this node. BroadcastDataMessageForRoom keeps its
signature and calls it.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
* rtc: say what sourceID does in the BroadcastDataMessageForRoomFrom comment
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
---------
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>