MLflow experiment tracking from Jupyter notebook

[kiyeonjeon21]

Priority: P1

MLflow is running but has no sample experiment. Create a notebook that trains a model and logs to MLflow.

What to do

• Create notebooks/05-mlflow-experiment.ipynb
• Train a simple scikit-learn model using e-commerce data from PostgreSQL
• Log parameters, metrics, and model artifact to MLflow at http://ds-mlflow:5005

Acceptance criteria

• Notebook runs end-to-end with ai-ml-platform recipe
• At least 1 experiment with 2+ runs visible in MLflow UI
• Logged artifacts include model + metrics
• Markdown cells explain each step