Add reviewer GitHub token to Cassandra AI Review

[menny]

No description provided.

[github-actions]

The PR title and commit messages are descriptive and accurate. However, adding a brief explanation in the PR description about why this token change is needed would improve transparency for future maintainers. The addition of the token is a standard configuration update for CI tools, though we should always lean towards the principle of least privilege.

[github-actions]

The reviewer raised a security concern regarding the use of a high-privilege organization token instead of a repository-scoped token and requested further documentation.

[github-actions]

Evaluate if secrets.CODE_REVIEW_ORG_TOKEN is strictly necessary. GitHub Actions provide a default secrets.GITHUB_TOKEN which is scoped to the repository and usually sufficient. Using an Organization-level token increases the blast radius if the secret is compromised or if the action has a vulnerability. If special permissions are required, document why the default token is insufficient.