Refactor: add SerializeTypeMetadataBase for serializers

Introduce SerializeTypeMetadataBase<TMetadata> as a new abstract base class for serializer type metadata, extending TypeMetadataBase. Update Binary, JSON, and Toon serializer metadata classes to inherit from this new base, enabling shared serializer-specific logic and improving code organization. No functional changes to serialization behavior.

AyCode.Core/Serializers/Binaries/AcBinarySerializer.BinarySerializeTypeMetadata.cs

@@ -9,7 +9,7 @@ namespace AyCode.Core.Serializers.Binaries;
 
 public static partial class AcBinarySerializer
 {
-    internal sealed class BinarySerializeTypeMetadata : TypeMetadataBase<BinarySerializeTypeMetadata>
+    internal sealed class BinarySerializeTypeMetadata : SerializeTypeMetadataBase<BinarySerializeTypeMetadata>
     {
         public BinaryPropertyAccessor[] Properties { get; }
 

AyCode.Core/Serializers/Jsons/AcJsonSerializer.JsonSerializeTypeMetadata.cs

@@ -12,7 +12,7 @@ public static partial class AcJsonSerializer
     private static JsonSerializeTypeMetadata GetTypeMetadata(in Type type)
         => JsonSerializeTypeMetadata.GetOrCreateMetadata(type, static t => new JsonSerializeTypeMetadata(t));
 
-    private sealed class JsonSerializeTypeMetadata : TypeMetadataBase<JsonSerializeTypeMetadata>
+    private sealed class JsonSerializeTypeMetadata : SerializeTypeMetadataBase<JsonSerializeTypeMetadata>
     {
         public PropertyAccessor[] Properties { get; }
 

AyCode.Core/Serializers/SerializeTypeMetadataBase.cs

@@ -0,0 +1,24 @@
+using System.Reflection;
+
+namespace AyCode.Core.Serializers;
+
+/// <summary>
+/// Base class for serializer type metadata.
+/// Extends TypeMetadataBase for serializer-specific functionality.
+/// Used by Binary, JSON, and Toon serializers.
+/// Generic version provides built-in ThreadLocal caching with zero ref parameter overhead.
+/// </summary>
+/// <typeparam name="TMetadata">The concrete metadata type (must inherit from this class).</typeparam>
+public abstract class SerializeTypeMetadataBase<TMetadata> : TypeMetadataBase<TMetadata>
+    where TMetadata : SerializeTypeMetadataBase<TMetadata>
+{
+    protected SerializeTypeMetadataBase(Type type, Func<PropertyInfo, bool> ignorePropertyFilter) 
+        : base(type, ignorePropertyFilter)
+    {
+        // Base class handles:
+        // - ReadableProperties, WritableProperties
+        // - IId detection (IsIId, IdType, IdAccessorType, GetIdInt32/64/Guid)
+        // - CompiledConstructor
+        // - HasComplexProperties, NeedsReferenceTracking flags (set by derived classes)
+    }
+}

AyCode.Core/Serializers/Toons/AcToonSerializer.ToonSerializeTypeMetadata.cs

@@ -10,9 +10,9 @@ public static partial class AcToonSerializer
 {
     /// <summary>
     /// Cached metadata for a type including properties, type name, and descriptions.
-    /// Uses TypeMetadataBase infrastructure for shared caching across all serializers.
+    /// Uses SerializeTypeMetadataBase infrastructure for shared caching across all serializers.
     /// </summary>
-    private sealed class ToonSerializeTypeMetadata : TypeMetadataBase<ToonSerializeTypeMetadata>
+    private sealed class ToonSerializeTypeMetadata : SerializeTypeMetadataBase<ToonSerializeTypeMetadata>
     {
         public string TypeName { get; }
         public string ShortTypeName { get; }
@@ -58,6 +58,7 @@ public static partial class AcToonSerializer
         }
     }
 
+
     /// <summary>
     /// Property accessor with compiled getter and cached navigation metadata.
     /// Extends PropertyAccessorBase for shared functionality and adds Toon-specific metadata.