Gather Argo usage stats, such as facets/queries

[andrewjbtw]

Decoupling the Argo indexing has raised questions about the usage patterns for Argo facets and searches. We would benefit from gathering and analyzing this data in some way. To consider:

• what questions we would like to answer
• what tooling might be needed
• what data to gather
• how to do this and respect privacy (it may be a staff application but this still matters)

Different questions could be answered with different tools. SDR workflows can be so disparate and varied that knowing a facet is used at all may be as important as knowing how much it is used. For example, I use the three "workflows" facets all the time to monitor how the system is working. It's unlikely that many other people ever use those facets at all.

[ndushay]

One possibility would be to use google analytics in the way the access team has used it for SearchWorks.