* 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:
From the ashes of devastated Bialya they rise again--War, Pestilence, Famine, and Death. Freed from the thrall of the mad geniuses who first summoned them, the Horsemen look to their own dark ambition to remake the Earth in their image--and only the combined might of Superman, Batman and Wonder Woman can stop them!