feat: 管理端核心实体CRUD补齐

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

@@ -0,0 +1,15 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Deliveries.Dto;
+
+namespace TakeoutSaaS.Application.App.Deliveries.Queries;
+
+/// <summary>
+/// 配送单详情查询。
+/// </summary>
+public sealed class GetDeliveryOrderByIdQuery : IRequest<DeliveryOrderDto?>
+{
+    /// <summary>
+    /// 配送单 ID。
+    /// </summary>
+    public long DeliveryOrderId { get; init; }
+}