General question about N day retention in Unity Analytics: is it calculated with a per-user rolling 24 hour window? Or is each calendar day a cohort for the purposes of retention? The latter method is generally considered to be inaccurate because a user can visit the app at 11:59pm and then 12:01am and be counted as retaining for 1 day when they've really only been retained for a few minutes. Just curious how Unity does this because the docs don't go into that much detail about the calculation. Thanks!