add signature id

app/controllers/account_configs_controller.rb

@@ -13,7 +13,8 @@ class AccountConfigsController < ApplicationController
     AccountConfig::FORM_WITH_CONFETTI_KEY,
     AccountConfig::DOWNLOAD_LINKS_AUTH_KEY,
     AccountConfig::FORCE_SSO_AUTH_KEY,
-    AccountConfig::FLATTEN_RESULT_PDF_KEY
+    AccountConfig::FLATTEN_RESULT_PDF_KEY,
+    AccountConfig::WITH_SIGNATURE_ID
   ].freeze
 
   InvalidKey = Class.new(StandardError)

app/controllers/api/attachments_controller.rb

@@ -16,7 +16,7 @@ module Api
         cookies.encrypted[:signature_uuids] = build_new_cookie_signatures_json(submitter, attachment)
       end
 
-      render json: attachment.as_json(only: %i[uuid], methods: %i[url filename content_type])
+      render json: attachment.as_json(only: %i[uuid created_at], methods: %i[url filename content_type])
     end
 
     def build_new_cookie_signatures_json(submitter, attachment)

app/controllers/submit_form_values_controller.rb

@@ -15,7 +15,7 @@ class SubmitFormValuesController < ApplicationController
 
     render json: {
       value:,
-      attachment: attachment&.as_json(only: %i[uuid], methods: %i[url filename content_type])
+      attachment: attachment&.as_json(only: %i[uuid created_at], methods: %i[url filename content_type])
     }, head: :ok
   end
 end