Add Active Job adapter

This starts us down the path of using Active Job, which is the preferred mechanism for jobs in Rails 7.1.

Signed-off-by: jonathan.kerr <3410350+jonodrew@users.noreply.github.com>

Author: jonodrew

config/application.rb

@@ -31,6 +31,9 @@ class Application < Rails::Application
 
     config.active_record.belongs_to_required_by_default = true
 
+    # let's start using Active Job!
+    config.active_job.queue_adapter = :delayed_job
+
     if ENV["RAILS_LOG_TO_STDOUT"].present?
       $stdout.sync = true
       config.rails_semantic_logger.add_file_appender = false