Monitor website usage analytics

In order to track adoption, we need a Grafana dashboard estimating how many users are interacting with the dashboard, and what they are doing.

This is standard website usage analytics, so take into consideration any GDPR implications, and possible usage of frameworks.

Start by reviewing the dashboard's existing analytics and Grafana setup; the issue names no files or tests. Clarify which interactions and user counts must be measured, identify GDPR constraints, and define a privacy-preserving dashboard as the completion criteria.

Written by the indexing model from the issue text.