PERF: Remove database query when publishing to staff users.

app/jobs/regular/backup_chunks_merger.rb

@@ -32,7 +32,7 @@ module Jobs
       # push an updated list to the clients
       store = BackupRestore::BackupStore.create
       data = ActiveModel::ArraySerializer.new(store.files, each_serializer: BackupFileSerializer).as_json
-      MessageBus.publish("/admin/backups", data, user_ids: User.staff.pluck(:id))
+      MessageBus.publish("/admin/backups", data, group_ids: [Group::AUTO_GROUPS[:staff]])
     end
 
   end

app/jobs/regular/emit_web_hook_event.rb

@@ -103,7 +103,7 @@ module Jobs
       MessageBus.publish("/web_hook_events/#{@web_hook.id}", {
         web_hook_event_id: web_hook_event.id,
         event_type: @arguments[:event_type]
-      }, user_ids: User.human_users.staff.pluck(:id))
+      }, group_ids: [Group::AUTO_GROUPS[:staff]])
     end
 
     def ping_event?(event_type)