feat: new background work process

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

spec/factories/ip_address_factory.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: ip_addresses
+#
+#  id         :integer          not null, primary key
+#  hostname   :string(255)
+#  ipv4       :string(255)
+#  ipv6       :string(255)
+#  priority   :integer
+#  created_at :datetime
+#  updated_at :datetime
+#  ip_pool_id :integer
+#
+FactoryBot.define do
+  factory :ip_address do
+    ip_pool
+    ipv4 { "10.0.0.1" }
+    ipv6 { "2001:0db8:85a3:0000:0000:8a2e:0370:7334" }
+    hostname { "ip.example.com" }
+  end
+end