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>

tests/Meezi.API.Tests/TestServiceScopeFactory.cs

@@ -0,0 +1,25 @@
+using Meezi.API.Services.Printing;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Meezi.API.Tests;
+
+internal sealed class NoOpPrinterService : IPrinterService
+{
+    public Task<PrintResult> PrintReceiptAsync(string cafeId, string orderId, CancellationToken ct = default) =>
+        Task.FromResult(PrintResult.Ok());
+
+    public Task<PrintResult> PrintKitchenTicketAsync(string cafeId, string orderId, CancellationToken ct = default) =>
+        Task.FromResult(PrintResult.Ok());
+
+    public Task<PrintResult> TestPrintAsync(string printerIp, int port, CancellationToken ct = default) =>
+        Task.FromResult(PrintResult.Ok());
+}
+
+internal static class TestServiceScopeFactory
+{
+    public static IServiceScopeFactory Create() =>
+        new ServiceCollection()
+            .AddSingleton<IPrinterService, NoOpPrinterService>()
+            .BuildServiceProvider()
+            .GetRequiredService<IServiceScopeFactory>();
+}