Add root-aware privileged CI test lane

tests/LibNftables.Tests/NftablesClientIntegrationTests.cs

@@ -71,6 +71,27 @@ public sealed class NftablesClientIntegrationTests
         }
     }
 
+    [Fact]
+    [Trait("Category", "Privileged")]
+    public void Snapshot_WithPrivilegedLane_ReturnsRuleset()
+    {
+        if (!CanCreateClient())
+        {
+            return;
+        }
+
+        if (!NativeTestSupport.ShouldRunPrivilegedTests())
+        {
+            return;
+        }
+
+        var client = new NftablesClient();
+
+        NftSnapshot snapshot = client.Snapshot();
+
+        Assert.False(string.IsNullOrWhiteSpace(snapshot.RulesetText));
+    }
+
     [Fact]
     public void ValidateRuleset_WithTypedSetDefinition_ReturnsValidResult()
     {