🔧 MAINTENANCE: Configuration migration system

[LarsArtmann]

Description

Need configuration migration system to handle format changes gracefully and provide backwards compatibility.

Current State

• ✅ Configuration loading working with YAML
• ✅ Validation system implemented
• ✅ Template generation working
• ❌ No migration system for format changes
• ❌ No backwards compatibility handling
• ❌ No version tracking for configurations

Requirements

1. Configuration Versioning

   • Add version field to configuration
   • Track configuration format versions
   • Maintain migration paths between versions

2. Migration Engine

   • Automatic detection of configuration version
   • Migration functions between versions
   • Backwards compatibility support
   • Migration validation

3. User Experience

   • Migration notifications
   • Backup creation before migration
   • Rollback capability
   • Migration confirmation

Implementation Tasks

• Add version tracking to configuration system
• Implement migration engine with version detection
• Create migration functions for common changes
• Add backup/restore functionality
• Implement migration validation
• Add user notifications and confirmations
• Create rollback capability

Migration Examples

1. Protected Path Format Changes

   • Old: array of strings
   • New: object with categories

2. Profile Structure Updates

   • Add new operation types
   • Update risk level handling
   • Modify settings structure

3. Validation System Changes

   • New validation levels
   • Updated field requirements
   • Enhanced error handling

Priority

MEDIUM - System maintenance and future-proofing

Dependencies

• Configuration loading: COMPLETE ✅
• Validation system: COMPLETE ✅
• Template generation: COMPLETE ✅

Acceptance Criteria

• Configuration version detection works automatically
• Migration between versions is seamless
• Backups are created before migration
• Rollback capability is available
• User notifications are clear and actionable
• Migration validation prevents corruption
• Backwards compatibility is maintained

User Value

• Smooth configuration format updates
• No data loss during system changes
• Easy migration to new features
• Confidence in system updates
• Protection against configuration corruption

---

[LarsArtmann]

Today completed CRITICAL foundation for configuration migration:

Completed Prerequisites (ALL ✅):

✅ Configuration Loading: Real YAML parsing implemented, ghost system eliminated
✅ Validation System: Type-safe validation with ValidationResult implemented
✅ Template Generation: Working with proper ValidationSanitizedData structure
✅ Domain Model: Configuration structures ready for version tracking
✅ Error Handling: Centralized error system with proper migration support

Migration Foundation Ready:

• Configuration files load and validate correctly
• Type-safe ValidationResult with Sanitized data tracking
• Template generation system for format updates
• Domain model ready for version field addition
• Error system ready for migration status reporting

Implementation Status:

🟡 READY FOR IMPLEMENTATION - All dependencies completed
🟡 MEDIUM PRIORITY - System maintenance and future-proofing
🟡 FOUNDATION SOLID - Configuration system fully functional

The ValidationSanitizedData structure created today directly supports migration tracking with FieldsModified, RulesApplied, and Metadata fields. Configuration loading is stable and ready for version detection.

Tomorrow should implement actual migration engine since all foundation work is complete.