Add codecov test analytics (#695)

Author: edenhaus

.github/workflows/ci.yml

@@ -62,10 +62,17 @@ jobs:
         run: uv sync --locked --dev
 
       - name: Run pytest
-        run: uv run --frozen pytest tests --cov=./ --cov-report=xml
+        run: uv run --frozen pytest tests --cov=./ --cov-report=xml --junitxml=junit.xml -o junit_family=legacy
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true
+
+      - name: Upload test results to Codecov
+        if: ${{ !cancelled() }}
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true