* 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:
Having an overactive imagination can get a kid through a lot, but it doesn't change the facts: Joe's still the kid in school that can't fit in and he suffers from Type 1 diabetes. So is it insulin-deprived delirium or something much, much bigger that transports Joe to a land inhabited by all his toys--filled with from ninja commandos to action robots to magical knights to star fleet captains?!