Revert "refactor: 清理租户API旧模块代码"

This reverts commit 992930a821.

src/Application/TakeoutSaaS.Application/App/Inventory/Commands/DeductInventoryCommand.cs

@@ -0,0 +1,35 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Inventory.Dto;
+
+namespace TakeoutSaaS.Application.App.Inventory.Commands;
+
+/// <summary>
+/// 扣减库存命令（履约/支付成功）。
+/// </summary>
+public sealed record DeductInventoryCommand : IRequest<InventoryItemDto>
+{
+    /// <summary>
+    /// 门店 ID。
+    /// </summary>
+    public long StoreId { get; init; }
+
+    /// <summary>
+    /// SKU ID。
+    /// </summary>
+    public long ProductSkuId { get; init; }
+
+    /// <summary>
+    /// 扣减数量。
+    /// </summary>
+    public int Quantity { get; init; }
+
+    /// <summary>
+    /// 是否预售锁定转扣减。
+    /// </summary>
+    public bool IsPresaleOrder { get; init; }
+
+    /// <summary>
+    /// 幂等键（与锁定请求一致可避免重复扣减）。
+    /// </summary>
+    public string? IdempotencyKey { get; init; }
+}