* 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:
The world's first superheroes reunite once more to form the Justice Society of America! Join the original Green Lantern Alan Scott, the first fastest man alive the Flash Jay Garrick, the man who taught Batman to box, Wildcat, and a slew of younger heroes as they built the world of tomorrow, today!