Improved performance of spaces/me call

Changes in: api Permalink

If you are calling the endpoint api.storyblok.com/v1/cdn/spaces/me before every page rendering to get the cache version we have good news for your. The call just got 1000 times faster with a 2 second CDN cache. This reduces also the risk to run in a rate limit error. To make sure that static website builds are getting the right version the webhook executions got delayed by 2 seconds too.