v4.0.0b4

feat: Enhance production validation and settings management

- Introduced strict production validation during migration processes.
- Added validation for production settings, including new fields such as shutdown_timeout, update_timeout, and alert notifications.
- Implemented validation warnings for unknown public attributes and settings in production objects.
- Updated migration utilities to support strict validation and report issues during migration planning.
- Enhanced production model to include new settings and validation methods.
- Added tests to ensure proper validation behavior and migration plan reporting for production settings.