add dynamic documents

app/controllers/template_documents_controller.rb

@@ -16,7 +16,7 @@ class TemplateDocumentsController < ApplicationController
 
     old_fields_hash = @template.fields.hash
 
-    documents = Templates::CreateAttachments.call(@template, params, extract_fields: true)
+    documents, = Templates::CreateAttachments.call(@template, params, extract_fields: true)
 
     schema = documents.map do |doc|
       { attachment_uuid: doc.uuid, name: doc.filename.base }
@@ -27,7 +27,7 @@ class TemplateDocumentsController < ApplicationController
       fields: old_fields_hash == @template.fields.hash ? nil : @template.fields,
       submitters: old_fields_hash == @template.fields.hash ? nil : @template.submitters,
       documents: documents.as_json(
-        methods: %i[metadata signed_uuid],
+        methods: %i[metadata signed_key],
         include: {
           preview_images: { methods: %i[url metadata filename] }
         }