* 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:
"Three is Just Perfect" (by George Gladir & Goldberg): The love triangle of the new Millenium - Archie/Betty/Adam - continues! "Life is no Picnic" (by Mike Pellowski & Goldberg): A day in the country is anything but when Archie and Betty share a Murphy's law picnic. "Trust is a Must" (by Barbara Slate & Goldberg): Betty learns to trust her instincts in this sweet tale!