feat: 管理端核心实体CRUD补齐

src/Application/TakeoutSaaS.Application/App/Deliveries/Queries/SearchDeliveryOrdersQuery.cs

@@ -0,0 +1,21 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Deliveries.Dto;
+using TakeoutSaaS.Domain.Deliveries.Enums;
+
+namespace TakeoutSaaS.Application.App.Deliveries.Queries;
+
+/// <summary>
+/// 配送单列表查询。
+/// </summary>
+public sealed class SearchDeliveryOrdersQuery : IRequest<IReadOnlyList<DeliveryOrderDto>>
+{
+    /// <summary>
+    /// 订单 ID（可选）。
+    /// </summary>
+    public long? OrderId { get; init; }
+
+    /// <summary>
+    /// 配送状态。
+    /// </summary>
+    public DeliveryStatus? Status { get; init; }
+}