* Client-Side Metrics Include
* Wiki: https://tiny.amazon.com/cpso0wg6
* Needs to be included at the top of pages because it tracks latency--
* ue_t0 needs to be as close to body load as possible.
* - ue.tag maps to URLType dimension of OnlineQueryLog in PMET. Because we cannot add
* custome data to other dimensions in PMET through CSM, we are replicating it thrice to
* cover each store, page type, and the intersections of the two.
* - Whitelists are listed in the usage guide:
“Better Together” part six! The horror that kept our heroes trapped in nightmares of their own making is now loose in the world, and it’s taking possession of Batman, Superman and Wonder Woman! When the spawn of Mongul holds the keys to the most powerful heroes in the DC Universe-no one is safe!