Bug fixes
- Make scoring format option mandatory in cli ([`5639c1c`](https://github.com/markm-io/ai-essay-grader/commit/5639c1c741629a1f667051c4ccdb5aafd0d9809f))
Features
- Update scoring format handling in cli and validation logic ([`dfe151a`](https://github.com/markm-io/ai-essay-grader/commit/dfe151aa44af07ed6c5223eb2a85a81d80b6477b))