* 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:
“MULTIPLICITY” part one! The New Super-Man of China has been taken! The Red Son Superman of Earth-30 has been beaten! And who knows what’s happened to Sunshine Superman! Someone is collecting Supermen across the Multiverse-this looks like a job for our Kal-El as he is joined by Justice Incarnate in this multi-Earth epic!