Apparently Faircamp 1.2 was released last month, with support for track level metadata!
https://codeberg.org/simonrepp/faircamp/src/branch/main/CHANGELOG.md
That's my cue to start working on a version of Rainfall (https://rainfall.dev) that allows you to edit track metadata before generating your site.
Stay tuned!
cc: @freebliss
Related: I only now realized that "Rainfall" is a completely un-Google-able product name. Look at these search results for "rainfall music" and "rainfall music site"