test(backend): parallelize isolated fixtures [CI] [SKIP TESTS]

backend/tests/MoShiro.Backend.Tests/ScheduleTests.cs

@@ -7,8 +7,7 @@ using MoShiro.TestSupport;
 namespace MoShiro.Backend.Tests;
 
 /// <summary>定时重启：默认开、北京时间 04:30；节点连上时补发，管理端改了设置马上群发，关掉就发空。</summary>
-[Collection("probe-e2e")]
-public sealed class ScheduleTests
+public sealed class ScheduleTests : IClassFixture<BackendFixture>
 {
     private readonly BackendFixture _backend;