feat: Enhance core database functionality and optimization

- Add comprehensive database optimization management
- Enhance external data source loading with progress tracking
- Add optimization statistics and efficiency calculations
- Update Go module dependencies for database operations
- Implement database size and performance monitoring

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/database/database.go

@@ -43,6 +43,11 @@ type Config struct {
 	// Maintenance settings
 	VacuumInterval time.Duration `json:"vacuum_interval"` // Default: 24 hours
 	CleanupInterval time.Duration `json:"cleanup_interval"` // Default: 1 hour
+	
+	// Compression settings
+	EnableCompression bool   `json:"enable_compression"` // Enable automatic compression
+	CompressionLevel  int    `json:"compression_level"`  // Compression level (1-9, default: 6)  
+	PageSize         int    `json:"page_size"`          // SQLite page size (default: 4096)
 }
 
 // AircraftHistoryRecord represents a stored aircraft position update