Add setter to Id property of ResponseItem

Author: joseharriaga

api/OpenAI.net8.0.cs

@@ -5907,7 +5907,7 @@ public class ResponseInputTokenUsageDetails : IJsonModel<ResponseInputTokenUsage
     }
     [Experimental("OPENAI001")]
     public class ResponseItem : IJsonModel<ResponseItem>, IPersistableModel<ResponseItem> {
-        public string Id { get; }
+        public string Id { get; set; }
         [Serialization.JsonIgnore]
         [EditorBrowsable(EditorBrowsableState.Never)]
         [Experimental("SCME0001")]

api/OpenAI.netstandard2.0.cs

@@ -5195,7 +5195,7 @@ public class ResponseInputTokenUsageDetails : IJsonModel<ResponseInputTokenUsage
         protected virtual BinaryData PersistableModelWriteCore(ModelReaderWriterOptions options);
     }
     public class ResponseItem : IJsonModel<ResponseItem>, IPersistableModel<ResponseItem> {
-        public string Id { get; }
+        public string Id { get; set; }
         [Serialization.JsonIgnore]
         [EditorBrowsable(EditorBrowsableState.Never)]
         public ref JsonPatch Patch { get; }

src/Custom/Responses/Items/Reference/ReferenceResponseItem.cs

@@ -2,8 +2,8 @@ namespace OpenAI.Responses;
 
 // CUSTOM:
 // - Renamed.
-// - Made internal the constructor that does not take the item ID, because contrary to other item
-//   types, the ID of reference items is not read-only and is required.
+// - Made internal the constructor that does not take the item ID because, contrary to other item types, the ID of
+//   reference items is required in both input and output scenarios.
 [CodeGenType("DotNetItemReferenceItemResource")]
 [CodeGenVisibility(nameof(ReferenceResponseItem), CodeGenVisibility.Internal)]
 public partial class ReferenceResponseItem

src/Custom/Responses/Items/ResponseItem.cs

@@ -10,9 +10,9 @@ namespace OpenAI.Responses;
 [CodeGenType("ItemResource")]
 public partial class ResponseItem
 {
-    // CUSTOM: Specify read-only semantics for ID
+    // CUSTOM: Added setter because this is required in output scenarios and optional in input scenarios.
     [CodeGenMember("Id")]
-    public string Id { get; internal set; }
+    public string Id { get; set; }
 
     public static MessageResponseItem CreateUserMessageItem(IEnumerable<ResponseContentPart> contentParts)
     {