6.0.0: the leaked-elixir counter carries its own caveat, and three sharp edges filed off

Two pieces of agent feedback this afternoon, one bug and one negative result. The bug: a duel's elixir differential was a number when the spec said null, because each side's counter on a duel is a sum over two or three games played on different decks. The negative result: the note that said 'neither number is a skill measure' was served, read, and overridden the same morning by an agent writing per-battle commentary, because the number sat beside crowns and trophy change as if it were an outcome fact. So the counter now travels as one object on every participant of a battles_query row - leaked, the opponent's, the differential (null on duels), how many rounds the counters sum over, and the caveat itself - and the old flat fields are gone. Also in this release: verbosity is accepted on every tool (a tool with one size says so in a note and answers in full, instead of refusing), feedback messages may run to 8,000 characters, and a refusal for an over-long value now says how long it was. Contract 6.0.0; reconnect your client so it sees the new tool list. This is the last breaking release for a while: the contract is entering an additive-only stretch while more people connect.