* 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:
John Carter learned of the Legend of an earth man named Gullivar Jones who visited Barsoom before he did. When Gullivar's mystical rug is discovered Carter comes face to face with the legend when Gullivar is resurrected. Now, just as these two earth men come face to face, another threat looms with the return of Gullivar's greatest foes--the mysterious Thither people!