This AI sample lacks risk & safety evaluation implementation

As per email sent on 13th Dec with same subject, please double-check that this AI sample implements evaluations. In particular, what we are looking for is:
- [x] Evaluation file(s) (might be a Jupyter notebook, a unit test script, etc.) that evaluates the solution against quality metrics
- [ ] Evaluation file(s) (might be a Jupyter notebook, a unit test script, etc.) that evaluates the solution against at least 2 safety metrics
- [ ] A descriptive section in your readme explaining how evaluation is implemented into the sample.

Inspect the sample's existing evaluation file(s) and README first; the issue does not identify their paths. Confirm how quality evaluation is currently implemented, then add coverage for at least two safety metrics and document the evaluation approach in the README. Done means both unchecked checklist items are addressed.

Written by the indexing model from the issue text.