fix(core): nullable OpenAIErrorDetails fields (#315)

Author: aallam

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ### Fixed
 
+- **Core**: nullable `OpenAIErrorDetails` fields (#315)
 - **Messages**: nullable field `MessageContent.Image#fileId` (#313)
 
 ## 3.7.0

openai-core/src/commonMain/kotlin/com.aallam.openai.api/exception/OpenAIErrorDetails.kt

@@ -10,7 +10,7 @@ import kotlinx.serialization.Serializable
  */
 @Serializable
 public data class OpenAIError(
-    @SerialName("error") public val detail: OpenAIErrorDetails?,
+    @SerialName("error") public val detail: OpenAIErrorDetails? = null,
 )
 
 /**
@@ -23,8 +23,8 @@ public data class OpenAIError(
  */
 @Serializable
 public data class OpenAIErrorDetails(
-    @SerialName("code") val code: String?,
-    @SerialName("message") val message: String?,
-    @SerialName("param") val param: String?,
-    @SerialName("type") val type: String?,
+    @SerialName("code") val code: String? = null,
+    @SerialName("message") val message: String? = null,
+    @SerialName("param") val param: String? = null,
+    @SerialName("type") val type: String? = null,
 )