fix: json serialization and deserialization for NuCacheSerializerType (#19617)

fix: json serialization and deserialization

src/Umbraco.PublishedCache.HybridCache/Serialization/JsonContentNestedDataSerializer.cs

@@ -1,4 +1,4 @@
-using System.Text.Json;
+using System.Text.Json;
 using System.Text.Json.Serialization;
 using Umbraco.Cms.Core.Models;
 
@@ -8,7 +8,11 @@ internal class JsonContentNestedDataSerializer : IContentCacheDataSerializer
 {
     private static readonly JsonSerializerOptions _jsonSerializerOptions = new()
     {
-        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
+        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+        Converters =
+        {
+            new JsonObjectConverter(),
+        },
     };
 
     /// <inheritdoc />

src/Umbraco.PublishedCache.HybridCache/Serialization/JsonObjectConverter.cs

@@ -0,0 +1,22 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Umbraco.Cms.Core.Models;
+
+namespace Umbraco.Cms.Infrastructure.HybridCache.Serialization;
+
+internal class JsonObjectConverter : JsonConverter<object>
+{
+    public override object? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        => reader.TokenType switch
+        {
+            JsonTokenType.String => reader.GetString(),
+            JsonTokenType.Number => reader.TryGetInt64(out var l) ? l : reader.GetDouble(),
+            JsonTokenType.True => true,
+            JsonTokenType.False => false,
+            JsonTokenType.Null => null,
+            _ => JsonDocument.ParseValue(ref reader).RootElement.Clone(), // fallback for complex types
+        };
+
+    public override void Write(Utf8JsonWriter writer, object value, JsonSerializerOptions options)
+        => JsonSerializer.Serialize(writer, value, value.GetType(), options);
+}