feat: 管理端核心实体CRUD补齐

src/Application/TakeoutSaaS.Application/App/Payments/Commands/DeletePaymentCommand.cs

@@ -0,0 +1,14 @@
+using MediatR;
+
+namespace TakeoutSaaS.Application.App.Payments.Commands;
+
+/// <summary>
+/// 删除支付记录命令。
+/// </summary>
+public sealed class DeletePaymentCommand : IRequest<bool>
+{
+    /// <summary>
+    /// 支付记录 ID。
+    /// </summary>
+    public long PaymentId { get; set; }
+}