/**
 * Orders Domain - Checkout Types
 * 
 * Minimal type definitions for checkout flow.
 * Frontend handles its own URL param serialization.
 */

// This file is intentionally minimal after cleanup.
// The build/derive/normalize functions were removed as they were
// unnecessary abstractions that should be handled by the frontend.
// 
// See CLEANUP_PROPOSAL_NORMALIZERS.md for details.
