Added monthly_tests marker and .yaml file

.github/workflows/monthly-api-tests.yaml

@@ -0,0 +1,34 @@
+name: monthly API response check
+on: 
+  push:
+    branches: 
+      - monthly-api-checks
+  schedule: 
+    - cron: '5 9 15 * *'
+env:
+  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  GH_REPO: ${{ github.repository }}
+  WCKEY: ${{ secrets.WC_KEY }}
+  WCSECRET: ${{ secrets.WC_SECRET }}
+  WCSCOPES: "WorldCatMetadataAPI"
+jobs:
+  monthly-run:
+    name: Run monthly API response check
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version}}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version}}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r dev-requirements.txt
+
+      - name: Run monthly live tests
+        run: |
+          pytest -m "monthly_check"

pyproject.toml

@@ -60,6 +60,7 @@ markers = [
 	"webtest: mark a test hitting live endpoints",
 	"holdings: mark holdings live endpoint tests",
 	"http_code: use to pass returned http code to 'mock_session_response' fixture that mocks 'requests.Session.send' method",
+    "monthly_check: mark a test that should be run with monthly API response check",
 ]
 
 [tool.coverage.run]