feat: new background work process

This removes all previous dependencies on RabbitMQ and the need to run separate cron and requeueing processes.

lib/worker/jobs/base_job.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module Worker
+  module Jobs
+    class BaseJob
+
+      def initialize(logger:)
+        @logger = logger
+      end
+
+      def call
+        # Override me.
+      end
+
+      def work_completed?
+        @work_completed == true
+      end
+
+      private
+
+      def work_completed!
+        @work_completed = true
+      end
+
+      attr_reader :logger
+
+    end
+  end
+end