[WIP] Sub-Issue #22.3: Configuration Sync Engine

[Copilot]

Configuration Sync Engine Implementation Plan

Implementing Sub-Issue #22.3: Configuration Sync Engine for YAML-based configuration management.

Implementation Phases:

Phase 1: Core Models and Basic Sync

• Create database models for configuration management (ConfigType, ConfigValue, ConfigSyncSession, ConfigChange)
• Create migration for configuration tables
• Implement basic ConfigSyncEngine class with YAML loading
• Add core sync functionality for single files

Phase 2: Change Detection and Conflict Resolution

• Implement ChangeDetector class for identifying differences
• Add ConflictResolver for handling sync conflicts
• Enhance sync engine with change detection logic
• Add file checksum tracking for performance

Phase 3: Performance and Advanced Features

• Implement BatchProcessor for large datasets
• Add hierarchical data synchronization
• Implement dependency resolution
• Add sync session management and rollback

Phase 4: CLI Integration and Polish

• Create CLI commands for sync operations
• Add dry-run capabilities and progress reporting
• Implement comprehensive error handling
• Add sync validation and scheduling

Architecture Notes:

• Following existing FastAPI + SQLAlchemy patterns
• Tenant-aware models with proper isolation
• Leveraging existing PyYAML dependency
• Building on established migration system

Fixes #28.

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