Add CODECOV_TOKEN to coverage upload

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: wmayner

.github/workflows/test.yml

@@ -44,5 +44,6 @@ jobs:
         if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12'
         uses: codecov/codecov-action@v5
         with:
+          token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
           fail_ci_if_error: false