Update project metadata and add new JSON Schema properties: support array-like type of property to support optional props https://platform.openai.com/docs/guides/structured-outputs#all-fields-must-be-required

Author: repko-artem

OpenAI.SDK/ObjectModels/Converters.cs

@@ -91,9 +91,9 @@ public override void Write(Utf8JsonWriter writer, AssistantsApiToolChoiceOneOfTy
     }
 }
 
-public class SingleOrArrayToListConverter : JsonConverter<List<string?>>
+public class SingleOrArrayToListConverter : JsonConverter<IList<string?>>
 {
-    public override List<string?>? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
+    public override IList<string?>? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
         switch (reader.TokenType) {
             case JsonTokenType.String:
                 return [reader.GetString()];
@@ -119,7 +119,7 @@ public class SingleOrArrayToListConverter : JsonConverter<List<string?>>
         }
     }
 
-    public override void Write(Utf8JsonWriter writer, List<string?>? value, JsonSerializerOptions options) {
+    public override void Write(Utf8JsonWriter writer, IList<string?>? value, JsonSerializerOptions options) {
         if (value == null || value.Count == 0) {
             writer.WriteNullValue();
         } else if (value.Count == 1) {