feat(server): wide gamut thumbnails (#3658)

mobile/openapi/lib/api_helper.dart

@@ -70,6 +70,9 @@ String parameterToString(dynamic value) {
   if (value is CQMode) {
     return CQModeTypeTransformer().encode(value).toString();
   }
+  if (value is Colorspace) {
+    return ColorspaceTypeTransformer().encode(value).toString();
+  }
   if (value is DeleteAssetStatus) {
     return DeleteAssetStatusTypeTransformer().encode(value).toString();
   }