feat: page update notifications (#2074)

* feat: watchers notification and email preferences

* fix: email copy

* digests

* clean up

* fix

* clean up

* move backlinks queue-up to history processor

* fix

* fix keys

* feat: group notifications

* filter

* adjust email digest window

apps/server/src/core/notification/notification.module.ts

@@ -4,6 +4,7 @@ import { NotificationController } from './notification.controller';
 import { NotificationProcessor } from './notification.processor';
 import { CommentNotificationService } from './services/comment.notification';
 import { PageNotificationService } from './services/page.notification';
+import { PageUpdateEmailRateLimiter } from './services/page-update-email-rate-limiter';
 
 @Module({
   imports: [],
@@ -13,6 +14,7 @@ import { PageNotificationService } from './services/page.notification';
     NotificationProcessor,
     CommentNotificationService,
     PageNotificationService,
+    PageUpdateEmailRateLimiter,
   ],
   exports: [NotificationService],
 })