DEV: Convert some files to autoloading and various improvements (#26860)

plugins/automation/lib/discourse_automation/engine.rb

@@ -4,6 +4,11 @@ module ::DiscourseAutomation
   class Engine < ::Rails::Engine
     engine_name PLUGIN_NAME
     isolate_namespace DiscourseAutomation
+    config.autoload_paths << File.join(config.root, "lib")
+    scheduled_job_dir = "#{config.root}/app/jobs/scheduled"
+    config.to_prepare do
+      Rails.autoloaders.main.eager_load_dir(scheduled_job_dir) if Dir.exist?(scheduled_job_dir)
+    end
   end
 
   def self.filter_by_trigger(items, trigger)