* 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:
Donald Duckling and his friends get an important homework assignment from school: Decide what you want to be when you grow up! Everyone seems to know what, and who, they want to be. Everyone, that is, except Donald. Can Donald get this whole life figured out in time for the next class?