Adds two NIP-53 presence tags used by nostrnests' room UI:
["publishing", "0|1"] — peer is actively pushing audio packets
["onstage", "0|1"] — peer holds a speaker slot vs audience
These complement the existing "hand" and "muted" tags. They're
independent: a speaker can be onstage but paused (onstage=1,
publishing=0), or broadcasting silently (onstage=1, publishing=1,
muted=1). The participant grid (Tier 2) and listener counter (Tier 1
#8) consume them.
- PublishingTag / OnstageTag classes mirror HandRaisedTag's parse +
assemble shape exactly so the DSL (TagArrayBuilderExt) extends
uniformly.
- MeetingRoomPresenceEvent.publishing() / onstage() accessor parsers
return Boolean? (null when the tag isn't present) so callers can
distinguish "explicitly false" from "absent".
- The MeetingSpaceEvent overload of build() now accepts both fields
as nullable params; the MeetingRoomEvent overload deliberately
doesn't (those are tier-2 video meetings, not Clubhouse rooms).
- Round-trip tests pin the wire format and the "absent → null"
behaviour.
Claude
5a5eaa3b50