Add last_webhook_update_at timestamp to Subscription model. When a webhook
handler modifies a subscription, it stamps this field. Auto-sync, monitoring,
and force-check services skip subscriptions updated by webhook within the
last 60 seconds, preventing stale panel data from overwriting fresh
real-time changes.
- Add last_webhook_update_at column + migration
- Stamp all 8 webhook handlers with commit in every code path
- Add is_recently_updated_by_webhook() guard in 12 sync/monitoring paths
- Add REMNAWAVE_WEBHOOK_* variables to .env.example
- Add webhook setup documentation to README with Caddy/nginx examples
- Fix pre-existing yookassa webhook test (mock AsyncSessionLocal)
Remove AUTO_ACTIVATE_AFTER_TOPUP and SHOW_ACTIVATION_PROMPT_AFTER_TOPUP
features from all payment providers, config, system settings, and tests.
Cart auto-purchase (AUTO_PURCHASE_AFTER_TOPUP) is preserved.
Bug fixes:
- fix KeyError 'months' in devices.py for custom locale overrides
- fix IntegrityError on trial subscription retry (update existing PENDING instead of INSERT)
- fix PendingRollbackError cascade by adding db.rollback() before recovery
- fix TelegramForbiddenError not caught in photo_message.py
- fix "query is too old" spam in required_sub_channel_check
- add missing trial locale keys (TRIAL_PAYMENT_DESCRIPTION, TRIAL_REFUND_DESCRIPTION, TRIAL_ACTIVATION_ERROR)