feat(api): improve notifications, reviews, search, and subscriptions modules

- Add listing-sold event listener with spec for notifications
- Add review-deleted event listener with spec for reviews
- Improve search handlers with proper Typesense client injection
- Improve subscription handlers with ConfigService and quota tracking

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/notifications/notifications.module.ts

@@ -5,6 +5,7 @@ import { AgentVerifiedListener } from './application/listeners/agent-verified.li
 import { InquiryReceivedListener } from './application/listeners/inquiry-received.listener';
 import { ListingApprovedListener } from './application/listeners/listing-approved.listener';
 import { ListingRejectedListener } from './application/listeners/listing-rejected.listener';
+import { ListingSoldListener } from './application/listeners/listing-sold.listener';
 import { PaymentCompletedListener } from './application/listeners/payment-completed.listener';
 import { QuotaExceededListener } from './application/listeners/quota-exceeded.listener';
 import { SubscriptionExpiringListener } from './application/listeners/subscription-expiring.listener';
@@ -29,6 +30,7 @@ const EventListeners = [
   PaymentCompletedListener,
   SubscriptionExpiringListener,
   InquiryReceivedListener,
+  ListingSoldListener,
 ];
 
 @Module({