Speed Index can be affected by whether or not the user visits a page with a cold cache or if the page already is cached. It would be helpful for RUM users to know whether the user's page was cached or not. Is seems possible to know if the resources being fetched are cached or not from Navigation timing. Ideally Id like to know the median value of Speed Index and Visually Complete for RUM visits with cold cache and cached. Is this possible to track?