Sync wiki from repo: v4.4.0 billing offers, add Subscription Offers page Adds the v4.4.0 billing offer APIs and brings the wiki back in sync with the repo, which had drifted since v3.5.9. New: - Subscription Offers page — buying a specific offer, offer lookup by id/base plan/tag, BillingPeriod price normalization, trial eligibility, one-time product offers Updated: - Billing Integration — PBL v9, v4.4.0 deps, offer purchase, product-details diagnostics, obfuscated ids / personalized-offer disclosure - Subscriptions — account hold now detected client-side (ON_HOLD revokes isSubscriptionActive), payment recovery, pending plan changes - App Open Ads, Banner Ads, Configuration, Jetpack Compose — 4.3.x content that was never published Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>