check notebooks conform to general expectations

.github/workflows/check_notebook_standards.yml

@@ -0,0 +1,30 @@
+name: Check Notebook Standards
+
+on:
+  push:
+    branches: [ "master" ]
+    paths:
+      - "notebooks/**/*.ipynb"
+      - ".github/workflows/check_notebook_standards.yml"
+      - "test/src/check_notebook_standards.py"
+  pull_request:
+    branches: [ "master" ]
+    paths:
+      - "notebooks/**/*.ipynb"
+      - ".github/workflows/check_notebook_standards.yml"
+      - "test/src/check_notebook_standards.py"
+
+jobs:
+  check_standards:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Check notebook standards
+        run: python test/src/check_notebook_standards.py

notebooks/collections_demos/nlst_exploration.ipynb

@@ -43,7 +43,9 @@
     "\n",
     "Initial release: Sept 2024\n",
     "\n",
-    "Prepared by: Andrey Fedorov"
+    "Prepared by: Andrey Fedorov\n",
+    "\n",
+    "Updated: Feb 2026"
    ],
    "metadata": {
     "id": "xHaCamADy1Q_"