* 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:
Masked men, lawmen, dudes, owlhoots and vigilantes! From the battle of the Alamo to the dusty streets of Tombstone, the men and women of the West that was are finally unearthed in this scrapbook of memories from the personal collection of the modern-day Phantom Rider! Featuring entries on the Black Rider, Tex Dawson, Gunhawk, Kid Colt, the Masked Raider, the Outlaw Kid, the Phantom Rider, the Rawhide Kid, the Steam Rider, the Two-Gun Kid and more!