v4.0.0b9

feat: Introduce production change planning and application

- Added `plan` method to `Production` class for building change plans against current state.
- Implemented `apply` method to execute production change plans with options for destructive changes and backups.
- Introduced `verify` method to validate change plans before application.
- Created `rollback_backup` method for restoring previous production states from backups.
- Added `ProductionChangePlan`, `ProductionApplyResult`, and `ProductionVerifyResult` data classes to encapsulate change plan details and results.
- Implemented utility functions for building change plans, verifying them, and handling operations.
- Updated local and remote director protocols to support applying production plans.
- Enhanced CLI commands for planning and reviewing production changes, including error handling for remote execution.
- Added unit tests to cover new functionality, including safe and blocked operation classification, plan application, and verification.