* 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:
A guardian watches over Tokyo. Nobody knows where he came from. Some say he was created by the Yurei, ghosts of the sea, sent to remind mortals that it is they, not men, that control mankind's fate. Loved by many, vilified by few - he exacts swift justice on those who stand against him. Whatever he is, wherever he came from, one thing is certain - BlueSpear is here to stay!