This release enhances the reliability of the Key Encryption Service (KES) with improved health checks and ensures consistent security policy enforcement for Kubernetes STS authentication. These updates provide more accurate service status monitoring and strengthen access control mechanisms for critical workflows.

### Improvements
- Enhanced Key Encryption Service (KES) health monitoring by implementing a dedicated `/v1/ready` API endpoint. This change provides more accurate service readiness checks and prevents false-negative status reports. (#396)

### Bug Fixes
- Resolved an issue preventing the correct application of security policies during Kubernetes STS and `assumeRoleWithCertificate` authentication. Access controls are now consistently enforced as configured in these scenarios. (#417)