ci: gate on the fast tests (about 20s); slow end-to-end tests run in parallel with the image build [CI]

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

@@ -257,7 +257,9 @@ public sealed class AgentEndToEndTests
         }
     }
 
+    // 慢的端到端测试（真实时间的阶梯、要等测量块出来）：CI 里单独一批跑（Category=Slow），不拦着出镜像，见 ci/verify-backend.sh
     [Fact]
+    [Trait("Category", "Slow")]
     public async Task Hy2Ladder_EndToEnd_AgentSendsTheTrain_ProbeReportsReceipts_AndTheTestSucceeds()
     {
         await using AgentHarness agent = await AgentHarness.StartAsync(_backend);

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

@@ -221,6 +221,7 @@ public sealed class HostStatusTests
     }
 
     [Fact]
+    [Trait("Category", "Slow")]
     public async Task AProbeThatTurnsReportingOff_SendsNothing()
     {
         await _backend.SiteMustBePublicAsync();

backend/tests/MoShiro.Backend.Tests/Ipv6Tests.cs

@@ -9,7 +9,9 @@ using MoShiro.TestSupport;
 namespace MoShiro.Backend.Tests;
 
 /// <summary>真实双栈回环：同一身份的两种会话、原始块、查询与测试结果必须各自独立。</summary>
+// 慢的端到端测试（真实时间的阶梯、要等测量块出来）：CI 里单独一批跑（Category=Slow），不拦着出镜像，见 ci/verify-backend.sh
 [Collection("probe-e2e")]
+[Trait("Category", "Slow")]
 public sealed class Ipv6Tests
 {
     private readonly BackendFixture _backend;

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

@@ -67,6 +67,7 @@ public sealed class OnDemandTestsTests
     }
 
     [Fact]
+    [Trait("Category", "Slow")]
     public async Task Hy2Ladder_RunsEndToEnd_AndProducesAResultWithScores()
     {
         await using AgentSimulator agent = await AgentWithProbeAsync();

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

@@ -179,7 +179,9 @@ public sealed class OperationsAndSecurityTests
         Assert.Equal("fleet_protocol_violation", (await agent.RequestRawAsync("fleet.exec")).Error!.Data!.Code);
     }
 
+    // 慢的端到端测试（真实时间的阶梯、要等测量块出来）：CI 里单独一批跑（Category=Slow），不拦着出镜像，见 ci/verify-backend.sh
     [Fact]
+    [Trait("Category", "Slow")]
     public async Task ARepeatOffender_IsDisconnected_AndANodeCannotInitiateWhatOnlyTheBackendMay()
     {
         await using AgentSimulator agent = await _backend.ConnectAgentAsync();

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

@@ -3,7 +3,9 @@ using System.Text.Json.Nodes;
 namespace MoShiro.Backend.Tests;
 
 /// <summary>真实的后端 + 真实的 Agent + 真实的 Probe（都在进程内，回环网络）。</summary>
+// 慢的端到端测试（真实时间的阶梯、要等测量块出来）：CI 里单独一批跑（Category=Slow），不拦着出镜像，见 ci/verify-backend.sh
 [Collection("probe-e2e")]
+[Trait("Category", "Slow")]
 public sealed class ProbeEndToEndTests
 {
     private readonly BackendFixture _backend;