Sent with QoS 0, not retained.
Will be sent at 2Hz. It is the best estimate of our system of the cash lying on the
table right now, as to how many bills of each denomination we see.
Like side_bet_sensor this ignores rounds: it is what is on the felt at this moment, so
bills leave it as soon as they are taken away or occluded. Deciding that a buy-in
happened, and for how much, is the consumer's job.
Which denominations can appear is a property of the deployed cash model, so a note this
table never sees never shows up. Entries with a count of zero are left out, and an empty
list means we see no cash at all. There is no total: a table can see more than one
currency, and those do not add up.
Positions and track ids are deliberately not here. Use blackjack/live_update if you
need where on the table a single bill lies.