* 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:
Collects What If? Spider-Man: House of M, What If? Secret Invasion, What If? World War Hulk, What If? Daredevil Vs. Elektra, and What If? Astonishing X-Men. Witness the shocking alternatives to Marvel's biggest events! What If Gwen Stacy Survived The House of M? What if the Skrull invasion was a success? What if the heroes lost World War Hulk? And more!