test: address review feedback — cover WaitForAsync predicate overload; clarify ChildrenAccessor parity row; dedup object-method exclusion

tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Scripts/CompileSurfaceParityTests.cs

@@ -100,6 +100,11 @@ public class CompileSurfaceParityTests
         {
             new object[] { typeof(AttributeAccessor), typeof(ScriptCompileSurface.CompileAttributeAccessor) },
             new object[] { typeof(CompositionAccessor), typeof(ScriptCompileSurface.CompileCompositionAccessor) },
+            // ChildrenAccessor currently exposes only an indexer (no public instance
+            // methods), so this row guards nothing today. It is kept so that if a
+            // callable method is ever added to ChildrenAccessor, this Theory begins
+            // enforcing a mirror for it automatically — rather than silently
+            // re-opening the WaitAsync-class gap.
             new object[] { typeof(ChildrenAccessor), typeof(ScriptCompileSurface.CompileChildrenAccessor) },
         };
 
@@ -138,14 +143,6 @@ public class CompileSurfaceParityTests
     {
         const BindingFlags flags = BindingFlags.Public | BindingFlags.Instance;
 
-        var objectMembers = new HashSet<string>(StringComparer.Ordinal)
-        {
-            nameof(ToString),
-            nameof(GetHashCode),
-            nameof(Equals),
-            nameof(GetType),
-        };
-
         var names = new HashSet<string>(StringComparer.Ordinal);
 
         foreach (var property in type.GetProperties(flags))
@@ -157,7 +154,7 @@ public class CompileSurfaceParityTests
             // property itself is already counted by name above.
             if (method.IsSpecialName)
                 continue;
-            if (objectMembers.Contains(method.Name))
+            if (ObjectMethodNames.Contains(method.Name))
                 continue;
             names.Add(method.Name);
         }