Fix namespaces for Zeitwerk class loader

app/models/contact/transferable.rb

@@ -0,0 +1,31 @@
+module Contact::Transferable
+  extend ActiveSupport::Concern
+
+  included do
+    validates :auth_info, presence: true
+    after_initialize :generate_auth_info, if: -> { new_record? && auth_info.blank? }
+  end
+
+  def transfer(new_registrar)
+    return identical(new_registrar) if identical(new_registrar)
+
+    new_contact = dup
+    new_contact.registrar = new_registrar
+    new_contact.original = self
+    new_contact.code = nil
+    new_contact.regenerate_code
+    new_contact.regenerate_auth_info
+    new_contact.remove_address unless self.class.address_processing?
+    new_contact.uuid = nil
+    new_contact.save(validate: false)
+    new_contact
+  end
+
+  protected
+
+  def generate_auth_info
+    self.auth_info = SecureRandom.hex(11)
+  end
+
+  alias_method :regenerate_auth_info, :generate_auth_info
+end