* 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:
When Magneto of the X-Men tries to rescue a young mutant on the run, he accidentally kicks off a series of events that will shake the Marvel Universe to its core! Who are the new Teen Brigade?! Who are the Brotherhood, and what do they want with the Young Masters of Evil?! And how is the Red Skull pulling the strings from beyond the grave?