feat: notifications (#1947)

* feat: notifications
* feat: watchers

* improvements

* handle page move for watchers

* make watchers non-blocking

* more

apps/server/src/integrations/queue/constants/queue.constants.ts

@@ -7,6 +7,7 @@ export enum QueueName {
   SEARCH_QUEUE = '{search-queue}',
   AI_QUEUE = '{ai-queue}',
   HISTORY_QUEUE = '{history-queue}',
+  NOTIFICATION_QUEUE = '{notification-queue}',
 }
 
 export enum QueueJob {
@@ -19,6 +20,7 @@ export enum QueueJob {
   DELETE_USER_AVATARS = 'delete-user-avatars',
 
   PAGE_BACKLINKS = 'page-backlinks',
+  ADD_PAGE_WATCHERS = 'add-page-watchers',
 
   STRIPE_SEATS_SYNC = 'sync-stripe-seats',
   TRIAL_ENDED = 'trial-ended',
@@ -61,4 +63,8 @@ export enum QueueJob {
   DELETE_PAGE_EMBEDDINGS = 'delete-page-embeddings',
 
   PAGE_HISTORY = 'page-history',
+
+  COMMENT_NOTIFICATION = 'comment-notification',
+  COMMENT_RESOLVED_NOTIFICATION = 'comment-resolved-notification',
+  PAGE_MENTION_NOTIFICATION = 'page-mention-notification',
 }