Uploads test report only on test failures

Reduces unnecessary artifact uploads by restricting test report uploads to failed test runs, helping to focus on actionable feedback and optimize storage usage.

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
         pytest tests/unit/ -v -m unit --html=report.html --self-contained-html
 
     - name: Upload Test Report
-      if: always()  # Upload report even if tests fail
+      if: failure()
       uses: actions/upload-artifact@v4
       with:
         name: test-report