add code cov

Author: Aurashk

.github/workflows/ci.yml

@@ -113,3 +113,11 @@ jobs:
 
       - name: Run tests
         run: pytest
+
+      - name: Upload coverage to Codecov
+        if: runner.os == 'Linux'
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml
+          fail_ci_if_error: true