GHSA-2cm6-r77w-6g96 MLflow: trace API endpoints lack proper authorization validators

• PyPI mlflow: >= 2.14.0rc0, < 3.13.0rc0 → fixed in 3.13.0rc0

In MLflow versions prior to 3.13.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the `_before_request` handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.