==== Goal
This task is about instrumenting Special:CheckUser so we can keep an eye on adoption as we roll it out across our projects.
==== Mock
https://prtksxna.github.io/wmf-cu-goodplace/compare.html
==== Metrics
I've laid out the questions we want to get answers to.
* Q: How often is the tool used?
** Log: Every time //Special:Investigate// accessed.
* Q: How many users does the investigation start with?
** Log:
* Q: How many users are under investigation by the time the investigation ends?
** Log:
* Q: How many records are fetched per target? Per investigation?
** Log:
* Q: How much time does a user spend on Preliminary check versus Compare versus Timeline? OR how often did they access the individual tabs over the course of the investigation?
** Log:
* Q: How many times were the tools under the IP address clicked?
** Log:
* Q: How many times did a user use sticky highlights?
** Log:
* Q: How many times did a user use the filters?
** Log:
* Q: How many times did a user get incomplete results?
** Log:
* Q: How long did a user spend waiting for the results? And how often did they quit the investigation (page close or back button) while the results were being generated?
** Log: