V13-FE-006: consolidate approved UI and contract hardening

docs/Design/kbx-foundation-v60-status-canonical-contract-hardening/backend/Shared/Experiments/Tests/KbxExperimentContractTests.cs

@@ -0,0 +1,3 @@
+using Kbx.Shared.Experiments.Generated;using Xunit;
+namespace Kbx.Shared.Experiments.Tests;
+public sealed class KbxExperimentContractTests{[Fact]public void ReferenceExperiment_IsDisabledByDefault(){var x=KbxExperimentCatalog.Experiments["exp.oms.order-list.exception-summary-v2"];Assert.Equal("draft",x.State);Assert.Equal(0,x.RolloutPercent);Assert.Equal(100,x.Variants.Sum(v=>v.Weight));Assert.Contains(x.Variants,v=>v.Key=="control");}}