Flaky CI: codecov/project

### Which jobs are flaking? codecov/project Detected in PR #8365, commit 4b54100. ### Which tests are flaking? codecov/project ### Since when has it been flaking? 2026-04-30 ### Reason for failure (if possible) The codecov/project check is failing because overall project coverage dropped by 2.98% (from 36.69% to 33.72%) due to 426 files with indirect coverage changes unrelated to the 7 files in the diff. The Codecov report itself confirms "All modified and coverable lines are covered by tests." The coverage decrease is caused by base-branch drift across hundreds of unrelated files, not by any missing test coverage in the changed code. This is a known pattern where codecov's project-level coverage gate triggers on base-branch coverage calculation shifts. ### Anything else we need to know? Automatically created by [oompa](https://github.com/qinqon/oompa). <!-- oompa-bot v:2a63401 -->