docs: add COSMO example notebook and update changelog

Author: info-gallary

CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Add `HelloWorld.ipynb` notebook to documentation for onboarding [\#69](https://github.com/mllam/neural-lam/issues/69) @info-gallary
+- Add `COSMO_example.ipynb` notebook to documentation for onboarding [\#69](https://github.com/mllam/neural-lam/issues/69) @info-gallary
 
 ### Fixed
 

docs/notebooks/COSMO_example.ipynb

@@ -6,7 +6,7 @@
    "source": [
     "# COSMO Example: End-to-End Model Training and Inference\n",
     "\n",
-    "This notebook provides a lightweight, end-to-end demonstration of the **Neural-LAM** workflow using a COSMO-structured setup. It is designed to be runnable on a **CPU** using synthetic/reduced data, allowing you to verify your environment and the training pipeline without requiring massive datasets or high-end GPUs.\n",
+    "This notebook provides a lightweight, end-to-end demonstration of the **Neural-LAM** workflow using a COSMO-structured setup. It is designed to be an **onboarding guide** runnable on a **CPU** using synthetic/reduced data. This allows you to verify your environment and the training pipeline without requiring the massive datasets or high-end GPUs used in the full paper reproduction.\n",
     "\n",
     "The workflow follows these steps:\n",
     "1. **Environment Setup**: Installation and imports.\n",
@@ -34,6 +34,7 @@
     "import os\n",
     "import numpy as np\n",
     "import xarray as xr\n",
+    "import pandas as pd\n",
     "import torch\n",
     "import yaml\n",
     "from pathlib import Path\n",
@@ -92,7 +93,6 @@
     "    ds.to_zarr(path, mode=\"w\")\n",
     "    print(f\"Synthetic Zarr created at {path}\")\n",
     "\n",
-    "import pandas as pd\n",
     "create_synthetic_zarr(WORKDIR / \"cosmo_sample.zarr\")"
    ]
   },