feat: automatically remove queued messages with stale locks (#2872)

app/scheduled_tasks/tidy_queued_messages_task.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class TidyQueuedMessagesTask < ApplicationScheduledTask
+
+  def call
+    QueuedMessage.with_stale_lock.in_batches do |messages|
+      messages.each do |message|
+        logger.info "removing queued message #{message.id} (locked at #{message.locked_at} by #{message.locked_by})"
+        message.destroy
+      end
+    end
+  end
+
+  def self.next_run_after
+    quarter_to_each_hour
+  end
+
+end