refactor: AdminApi 剔除租户侧能力

tests/TakeoutSaaS.Integration.Tests/Fixtures/TestIdGenerator.cs

@@ -0,0 +1,20 @@
+using System.Threading;
+using TakeoutSaaS.Shared.Abstractions.Ids;
+
+namespace TakeoutSaaS.Integration.Tests.Fixtures;
+
+/// <summary>
+/// 集成测试用雪花 ID 生成器（递增模拟）。
+/// </summary>
+public sealed class TestIdGenerator : IIdGenerator
+{
+    private long _current;
+
+    /// <summary>
+    /// 生成下一个 ID。
+    /// </summary>
+    /// <returns>递增的 long ID。</returns>
+    public long NextId()
+        => Interlocked.Increment(ref _current);
+}
+