refactor: Reorient generalizability downstream score results to be ke…

[anyangml]

…yed by domain.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.27%. Comparing base (66d102b) to head (6cf0b35).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #418   +/-   ##
=======================================
  Coverage   64.27%   64.27%           
=======================================
  Files          35       35           
  Lines        1657     1657           
  Branches      205      205           
=======================================
  Hits         1065     1065           
  Misses        548      548           
  Partials       44       44           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.