* 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:
It's here! The issue everything's been building towards! Will Doc regain his old body? Will Celeste's new, heroic attitude stick? Will Rusty ever be found? Will Frost keep Cosmic Rae's secret? All those questions -- and more -- will be answered!