Server-side cache: Support optional scoping/namespacing by custom key (so we can specify e.g. identity or $_SERVER.REMOTE_ADDR variable)
E.g. Allow caching of routes/server actions whose output depend on the logged-in user, e.g.
/api/user/notifications
This Server Action depends on the logged-in user, the current Wappler server-side cache is not suitable for this use-case