feat: execute full-repo remaining parity closure plan

tests/NATS.Server.Tests/JetStream/JetStreamStreamFeatureToggleParityTests.cs

@@ -0,0 +1,30 @@
+using NATS.Server.JetStream.Models;
+using NATS.Server.JetStream.Validation;
+
+namespace NATS.Server.Tests;
+
+public class JetStreamStreamFeatureToggleParityTests
+{
+    [Fact]
+    public void Stream_feature_toggles_are_preserved_in_config_model_and_validation()
+    {
+        var config = new StreamConfig
+        {
+            Name = "ORDERS",
+            Subjects = ["orders.*"],
+            Sealed = true,
+            DenyDelete = true,
+            DenyPurge = true,
+            AllowDirect = true,
+            MaxMsgSize = 1024,
+            MaxMsgsPer = 10,
+            MaxAgeMs = 5000,
+        };
+
+        JetStreamConfigValidator.Validate(config).IsValid.ShouldBeTrue();
+        config.Sealed.ShouldBeTrue();
+        config.DenyDelete.ShouldBeTrue();
+        config.DenyPurge.ShouldBeTrue();
+        config.AllowDirect.ShouldBeTrue();
+    }
+}