log what model is used for each metric

[sdaulton]

Summary: This reports which model config was used for each metric in gen_metadata.

Differential Revision: D66176489

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D66176489

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D66176489

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.74%. Comparing base (fa4c3b5) to head (c2b9641).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3083 +/- ## ======================================= Coverage 95.74% 95.74% ======================================= Files 488 488 Lines 49765 49768 +3 ======================================= + Hits 47649 47652 +3 Misses 2116 2116 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D66176489

[facebook-github-bot]

This pull request has been merged in facebook/Ax@1f9f7429acdd39354c32e729860ad86d3d4e511a.