* 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:
"Emperor Joker" part 1! Superman and Steel stand alone against a horribly twisted world, but will knowing who is responsible for mangling reality give them the edge they need to assemble a Yellow Paper Lantern, a Fish-headed Aquaman, a criminally prim Wonder Woman, and the Flab? Continued in SUPERMAN #161.