При InsufficientBalanceException в LedgerService::chargeForDelivery:
- DB::transaction откатывается (Deal/charge/balance не тронуты).
- Outer catch в createDealCopyForProject вызывает handleInsufficientBalance:
* UPDATE projects.is_active=false через pgsql_supplier (BYPASSRLS).
* Email ZeroBalancePausedMail через NotificationService::notifyZeroBalancePaused.
* Rate-limit 1/час/tenant через Redis SETNX (Cache::add).
* Log::warning с tenant_id/project_id/balance details.
- Возвращаем false (не rethrow), чтобы handle()-loop продолжал routing остальным tenant'ам.
5 тестов: project paused / email sent / rate-limit 1/h / 2nd email after 65min /
sharing-flow isolation (A paused, B receives).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Дмитрий