feat: 租户账单公告通知接口

src/Application/TakeoutSaaS.Application/App/Tenants/Dto/TenantNotificationDto.cs

@@ -0,0 +1,31 @@
+using System.Text.Json.Serialization;
+using TakeoutSaaS.Domain.Tenants.Enums;
+using TakeoutSaaS.Shared.Abstractions.Serialization;
+
+namespace TakeoutSaaS.Application.App.Tenants.Dto;
+
+/// <summary>
+/// 租户通知 DTO。
+/// </summary>
+public sealed class TenantNotificationDto
+{
+    [JsonConverter(typeof(SnowflakeIdJsonConverter))]
+    public long Id { get; init; }
+
+    [JsonConverter(typeof(SnowflakeIdJsonConverter))]
+    public long TenantId { get; init; }
+
+    public string Title { get; init; } = string.Empty;
+
+    public string Message { get; init; } = string.Empty;
+
+    public TenantNotificationChannel Channel { get; init; }
+
+    public TenantNotificationSeverity Severity { get; init; }
+
+    public DateTime SentAt { get; init; }
+
+    public DateTime? ReadAt { get; init; }
+
+    public string? MetadataJson { get; init; }
+}