feat(api): .NET 10 multi-tenant REST API

Full backend implementation:
- Multi-tenant cafe/restaurant management (menus, orders, tables, staff)
- POS order flow with ZarinPal and Snappfood payment integration
- OTP authentication via Kavenegar SMS
- QR digital menu with public discover/finder endpoints
- Customer loyalty, coupons, CRM
- PostgreSQL via EF Core, Redis for caching/sessions
- Background jobs, webhook handlers
- Full migration history

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/Meezi.Core/Delivery/UnifiedDeliveryOrder.cs

@@ -0,0 +1,41 @@
+using Meezi.Core.Enums;
+
+namespace Meezi.Core.Delivery;
+
+public record UnifiedDeliveryCustomer(
+    string Name,
+    string Phone,
+    string? Address = null,
+    double? Lat = null,
+    double? Lng = null);
+
+public record UnifiedDeliveryItem(
+    string Sku,
+    string Name,
+    int Quantity,
+    decimal UnitPrice,
+    string? Notes = null);
+
+public record UnifiedDeliveryPayment(
+    decimal Total,
+    string Method,
+    bool IsPaid,
+    decimal? Commission = null);
+
+public record UnifiedDeliveryInfo(
+    string Type,
+    int? EstimatedMinutes = null,
+    string? DriverName = null,
+    string? DriverPhone = null);
+
+/// <summary>Normalized inbound order from Snappfood, Tap30, or other delivery webhooks.</summary>
+public record UnifiedDeliveryOrder(
+    string ExternalId,
+    DeliveryPlatform Platform,
+    string VendorId,
+    DateTime CreatedAt,
+    UnifiedDeliveryCustomer Customer,
+    IReadOnlyList<UnifiedDeliveryItem> Items,
+    UnifiedDeliveryPayment Payment,
+    UnifiedDeliveryInfo Delivery,
+    UnifiedDeliveryStatus Status);