feat: Delete all/read notifications (#8844)

app/jobs/notification/delete_notification_job.rb

@@ -0,0 +1,15 @@
+class Notification::DeleteNotificationJob < ApplicationJob
+  queue_as :low
+
+  def perform(user, type: :all)
+    ActiveRecord::Base.transaction do
+      if type == :all
+        # Delete all notifications
+        user.notifications.destroy_all
+      elsif type == :read
+        # Delete only read notifications
+        user.notifications.where.not(read_at: nil).destroy_all
+      end
+    end
+  end
+end