test: prepare demo 1.0.1 candidate with frozen artifact verification

bootstrap.js

@@ -11,10 +11,11 @@ function loadGeneratedSaasModule() {
   return require('./dist/saas/generated').GeneratedSaasModule;
 }
 
-async function start() {
-  await prepareSaasServiceHost({
+async function start(options = {}) {
+  const session = await prepareSaasServiceHost({
     generated: loadGeneratedSaasModule(),
   });
+  if (options.verifySession) await options.verifySession(session);
   requireExactReleaseEnvironment();
   return Bootstrap.configure({
     baseDir: path.join(__dirname, 'dist'),