feat: Implement comprehensive plugin state management system with database persistence

[DJJones66]

🚀 Plugin State Management System

This PR introduces a comprehensive plugin state management system that enables plugins to persist their state across browser sessions and devices. The implementation includes both session-based and database-backed persistence with advanced features like compression, validation, lifecycle hooks, and cross-device synchronization.

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🔧 Changes Overview

🛠️ Backend Changes

New API Endpoints (/api/v1/plugin-state/)

• Full CRUD operations for plugin states
• Bulk operations and statistics endpoints
• Automatic compression for large states (>1KB)
• TTL support with cleanup endpoints

Database Models

• PluginState: Main state storage with versioning and sync support
• PluginStateHistory: Change tracking and audit trail
• PluginStateConfig: Plugin-specific configuration storage

Migration Support

• 7d0185f79500_add_plugin_states_table.py
• cb95bbe8b720_mark_settings_tables_restored.py (settings table restoration)

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💻 Frontend Changes

Core Services

• PluginStateFactory: Factory for creating plugin-specific state services
• PluginStateService: Individual plugin state management
• DatabasePersistenceManager: Database-backed persistence
• SessionStorageManager: Enhanced session storage with compression
• StateRestorationManager: Intelligent state restoration with fallbacks
• PluginStateLifecycleManager: Event-driven lifecycle management

Advanced Features

• State validation and sanitization
• Compression for large states
• Debounced saves
• Cross-device synchronization
• Migration from session to database storage
• Comprehensive error handling and recovery

Integration

• Service Registration: All new services registered in App.tsx
• Plugin Integration: PluginModuleRenderer updated to provide pluginState service
• Enhanced Service Bridge: Improved error handling and availability checking

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🌟 Key Features

📦 Multi-Strategy Persistence

• none: No persistence
• session: Browser session only
• persistent: Database-backed with cross-device sync
• custom: Plugin-defined persistence logic

✅ State Validation & Schema

• Type-safe state definitions
• Required/optional field validation
• Default value handling
• Custom validation functions

⚡ Performance Optimizations

• Automatic compression for large states
• Debounced save operations
• Efficient storage space management
• Cleanup of expired states

🧑‍💻 Developer Experience

• Simple plugin integration (pluginState service)
• Comprehensive test components
• Detailed logging and error handling
• Type safety throughout

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📈 Performance Impact

• Minimal: State management is opt-in and lazy-loaded
• Storage: Compressed states reduce storage usage
• Network: Efficient database operations with pagination
• Memory: Services are only instantiated when needed

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🔒 Security Considerations

• All state operations are user-scoped
• Proper authentication required for database operations
• State validation prevents injection attacks
• Sensitive data can be excluded from persistence

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🔮 Future Enhancements

• Real-time cross-device state synchronization
• State versioning and conflict resolution UI
• Plugin state analytics and insights
• Backup and restore functionality