Add effective date to terms of service (#33993)

app/serializers/rest/terms_of_service_serializer.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class REST::TermsOfServiceSerializer < ActiveModel::Serializer
+  attributes :effective_date, :effective, :content, :succeeded_by
+
+  def effective_date
+    object.effective_date.iso8601
+  end
+
+  def effective
+    object.effective?
+  end
+
+  def succeeded_by
+    object.succeeded_by&.effective_date&.iso8601
+  end
+
+  def content
+    markdown.render(format(object.text, domain: Rails.configuration.x.local_domain))
+  end
+
+  private
+
+  def markdown
+    @markdown ||= Redcarpet::Markdown.new(Redcarpet::Render::HTML, escape_html: true, no_images: true)
+  end
+end