Calendar event queue handler (#8630)

Signed-off-by: Nikolay Chunosov <Chunosov.N@gmail.com>

server/core/src/queue/types.ts

@@ -13,7 +13,10 @@ export enum QueueTopic {
   // A topic about user activity.
   Users = 'users',
 
-  TelegramBot = 'telegramBot'
+  TelegramBot = 'telegramBot',
+
+  // A topic about calendar events.
+  CalendarEventCUD = 'calendarEventCUD'
 }
 
 export interface ConsumerHandle {