* 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:
'Time Keeps Slipping,' Part 3. Mega Man's search for his kidnapped sister and clues to clear Dr. Light's name is coming up with nothing. And Dr. Wily is still at large! Maybe he can save the day with the help of the six Robot Masters! Or are the robots wandering right into Dr. Wily's latest trap?