Fixes coverage data upload in CI

Updates the CI workflow to correctly upload coverage data as an artifact.

Changes the path for coverage data upload to be relative, and includes hidden files to ensure all data is captured. This resolves issues where the coverage data file was not found during the upload process.

Author: Victor Bajada

.github/workflows/ci.yml

@@ -115,12 +115,15 @@ jobs:
           stat .coverage.${{ matrix.python-version }} || echo "File vanished!"
           echo "Working directory contents:"
           ls -la
+          echo "Current path:"
+          pwd
 
       - name: Upload coverage data
         uses: actions/upload-artifact@v4
         with:
           name: coverage-data-${{ matrix.python-version }}
-          path: ${{ github.workspace }}/.coverage.${{ matrix.python-version }}
+          path: .coverage.${{ matrix.python-version }}
+          include-hidden-files: true
           if-no-files-found: warn
 
   coverage: