add codecov integration

.github/workflows/unit-tests.yaml

@@ -34,4 +34,9 @@ jobs:
           poetry install
       - name: Unit tests
         run: |
-          poetry run pytest tests/
+          poetry run pytest tests/ --cov --cov-report=xml
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        if: matrix.python-version == 3.12
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

cli/pyproject.toml

@@ -118,6 +118,7 @@ types-cffi = ">=1.16.0.20240331"
 types-openpyxl = ">=3.1.5.20241020"
 types-regex = ">=2024.9.11.20240912"
 types-python-dateutil = ">=2.9.0.20241003"
+pytest-cov = "^6.0.0"
 
 [tool.poetry.build]
 script = "codeflash/update_license_version.py"