## Summary
- implement Spec 224 findings notifications and escalation v1 on top of the existing alerts and Filament database notification infrastructure
- add finding assignment, reopen, due soon, and overdue event handling with direct recipient routing, dedupe, and optional external alert fan-out
- extend alert rule and alert delivery surfaces plus add the Spec 224 planning bundle and candidate-list promotion cleanup
## Validation
- `cd apps/platform && ./vendor/bin/sail bin pint --dirty --format agent`
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Feature/Findings/FindingsNotificationEventTest.php tests/Feature/Findings/FindingsNotificationRoutingTest.php`
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Feature/Alerts/FindingsAlertRuleIntegrationTest.php tests/Feature/Alerts/SlaDueAlertTest.php tests/Feature/Notifications/FindingNotificationLinkTest.php`
## Filament / Platform Notes
- Livewire v4.0+ compliance is preserved
- provider registration remains unchanged in `apps/platform/bootstrap/providers.php`
- no globally searchable resource behavior changed in this feature
- no new destructive action was introduced
- asset strategy is unchanged and the existing `cd apps/platform && php artisan filament:assets` deploy step remains sufficient
## Manual Smoke Note
- integrated-browser smoke testing confirmed the new alert rule event options, notification drawer entries, alert delivery history row, and tenant finding detail route on the active Sail host
- local notification deep links currently resolve from `APP_URL`, so a local `localhost` vs `127.0.0.1:8081` host mismatch can break the browser session if the app is opened on a different host/port combination
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #261
