Billing model corrected:

- Pro:
  - Web: Stripe one-time Checkout payment.
  - Android: Google Play one-time purchase (product ID configured in Admin; verification integration comes with the mobile billing phase).
  - Lifetime entitlement.

- Pro Plus:
  - Stripe subscription.
  - Monthly and yearly billing.
  - Includes Pro + cloud sync + web app.

No new database migration is required by THIS patch.
If Version20260802113000 from the previous monthly/yearly update is still pending, run the normal Doctrine migration command after correcting your local MariaDB serverVersion setting.

Important: this patch does not include or modify .env.
