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/Entities/Table.cs

@@ -0,0 +1,21 @@
+namespace Meezi.Core.Entities;
+
+public class Table : TenantEntity
+{
+    public string BranchId { get; set; } = string.Empty;
+    public string? SectionId { get; set; }
+    public string Number { get; set; } = string.Empty;
+    public int Capacity { get; set; } = 4;
+    public string? Floor { get; set; }
+    public int SortOrder { get; set; }
+    public string QrCode { get; set; } = string.Empty;
+    public string? ImageUrl { get; set; }
+    public string? VideoUrl { get; set; }
+    public bool IsActive { get; set; } = true;
+    public bool IsCleaning { get; set; }
+
+    public Cafe Cafe { get; set; } = null!;
+    public Branch Branch { get; set; } = null!;
+    public TableSection? Section { get; set; }
+    public ICollection<Order> Orders { get; set; } = [];
+}