- tickets.py: guard against non-text messages in waiting_for_title FSM state
- payments.py: fix Wata webhook using wrong field name (order_id vs orderId),
add full payload to error log
- tariff.py: stop overwriting admin tariff settings on every bot restart,
sync_default_tariff_from_config now only creates if no tariff exists
- start.py: catch TelegramBadRequest specifically for "message is not modified"
instead of bare except with useless retry
- admin/tickets.py: downgrade ticket notification log from error to warning
for expected case of OAuth/email users without telegram_id
- pricing.py, countries.py, purchase.py: guard against expired FSM state
causing KeyError on 'period_days'
- blacklist_service.py: add 5-min in-memory cache to is_user_blacklisted()
to reduce DB load from per-request checks
- remnawave_service.py: fix "Session is closed" race condition — create
new RemnaWaveAPI instance per get_api_client() call instead of reusing
shared instance whose aiohttp session gets overwritten by parallel coroutines
071c23dd52