* 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:
On one side is Spider-Man. On the other are the Rhino, the Vulture, the Shocker, Tombstone, Electro, Mysterio and a lethal legion of his deadliest foes all in the employ of the master planner himself, Dr. Octopus. And caught in the middle? The newborn child of the Green Goblin and Menace.