* 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:
George Zapata loves watching cartoons, laughing hysterically in quiet coffee shops at calvin and hobbes books, and searching through the internet for random information that would never actually be needed in everyday life. He currently resides in a small town in New Jersey with only bears and turkeys as company.