- Include LIMITED status in subscription lookups (get_active_subscriptions_by_user_id, get_subscription_by_user_and_tariff) — fixes duplicate subscriptions when traffic exhausted
- Migration 0053: update partial unique index to include LIMITED
- Trial subscriptions no longer block tariff purchase — excluded from purchased_tariff_ids, handle_extend_subscription routes trial+tariff to tariff extend flow
- Replace hardcoded TrafficLimitStrategy.MONTH with get_traffic_reset_strategy() across all sync/create paths (remnawave_service, monitoring_service, admin_users)
- Subscriptions with tariff_id always use tariff pricing flow regardless of global sales mode — fixes 0₽ renewal in classic mode
- Support 100% promo group discount across all purchase/renewal flows — balance checks skip when price=0, validation allows final_total=0 when base_price>0
c0mrade
9b7ac47f16