Research how we can use privacy-preserving data collection techniques to gather the metrics we need

Goal for 2025: Kickstart project to collect the metrics we need in a privacy-preserving manner: potentially a poor-person's version implemented; potentially, have plans e.g. an analysis to get grants with the rest of Tor (so this would happen >= 2026) (@boyska)

Blueprint: https://gitlab.tails.boum.org/tails/blueprints/-/wikis/metrics#privacy-preserving-data-collection-techniques