Get this month's Tally AI usage

Returns the firm's current UTC-month usage of the LedgerHQ-managed Tally allowance ($5 per included Tally workspace: the Pro firm workspace plus active managed companies, or the SMB firm workspace as its first Tally business): state, spentCents, and limitCents, plus the period reset date, banked rollover credit (summary.bankedCents — unused included usage rolls forward up to $3 per included workspace per month, $250 firm cap), and purchased pack balance (summary.purchasedCents — $25 packs at $26 with $1 card-fee cushion, carries until spent). summary.allowancePack describes the buyable pack. Amounts are integer cents. Never returns secrets.