* 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:
Spinning out of the events of DC UNIVERSE: REBIRTH #1, a new day dawns for Earth's greatest heroes as they welcome three new members to the team, including...Superman? Who is this strange visitor from a dead world—and can he be trusted? Batman and Wonder Woman aren't so sure.