Run pytest in build workflow.

Author: Alan

.github/workflows/build.yml

@@ -32,6 +32,7 @@ jobs:
         uv run jupyter labextension list
         uv run jupyter labextension list 2>&1 | grep -ie "ipylab.*OK"
         uv run python -m jupyterlab.browser_check
+        uv run pytest
 
     - name: Upload extension packages
       uses: actions/upload-artifact@v4