New BotSubscriptionUpdated payload (user, invoicePayload, typed state:
Canceled/Active/Failed/Unknown) in dev.inmo.tgbotapi.types.payments and the
BotSubscriptionUpdatedUpdate for the new subscription update
(UPDATE_SUBSCRIPTION), FlowsUpdatesFilter.botSubscriptionUpdatedUpdatesFlow,
onBotSubscriptionUpdated trigger, waitBotSubscriptionUpdated expectation and
class casts. Notes the Telegram-side Mini App method-origin security hardening.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
