Add test coverage and JUnit XML reporting to CI workflow

Co-authored-by: db2002dominic <db2002dominic@gmail.com>

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
           UPSTREAM_BASE_URL: "http://test"
           UPSTREAM_API_KEY: "test"
         run: |
-          uv run pytest --verbose --tb=short
+          uv run pytest --verbose --tb=short --junit-xml=pytest.xml --cov=routstr --cov-report=term --cov-report=xml
 
       - name: Upload test results
         if: always()