* 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:
Once upon a time, there were two beautiful girls who were the best of friends! One day, a handsome prince came along and they both fell madly in love with him! Would this be the end of their lifelong friendship or would they all live happily ever after? Collects 'Betty in Wonderland,' 'Sleeping Betty,' 'There's No Place Like Riverdale,' and 'A Tale of Two Cinderellas.'