* 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:
Having seen the Liverpool Demon with his own eyes, Dr. Watson sets out to find the fiend's lair. Fearing the worst, Holmes searches frantically for his companion in the vast, uncharted labyrinth beneath the city's streets. Meanwhile, at Hitchcock's Menagerie, Inspector Thornton discovers to his horror that it's feeding time...