Report coverage in CI

.github/workflows/tests.yml

@@ -65,4 +65,29 @@ jobs:
         with:
           name: coverage-data-${{ matrix.maya-version }}
           path: .coverage.*
+          include-hidden-files: true
           if-no-files-found: ignore
+
+  coverage:
+    name: Combine and report coverage
+    runs-on: ubuntu-latest
+    needs: tests
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version-file: "pyproject.toml"
+      - name: Download coverage data
+        uses: actions/download-artifact@v4
+        with:
+          pattern: coverage-data-*
+          merge-multiple: true
+      - name: Combine coverage
+        run: |
+          uv tool install coverage
+          coverage combine
+          # Report to summary
+          coverage report --format=markdown >> $GITHUB_STEP_SUMMARY
+          # Report to console
+          coverage report