message: Fix duplicated AppFeature enum converter
diff: services.AddControllers().AddJsonOptions((jsonOptions) =>
  {
  - //jsonOptions.JsonSerializerOptions.Converters.Add(new JsonStringEnumMemberConverter()); // Macross.Json.Extensions https://github.com/dotnet/runtime/issues/31081#issuecomment-578459083
  + // TODO: when all JsonStringEnumMemberConverter target enum types will be commented out then the NuGet Macross.Json.Extensions package can be removed
  jsonOptions.JsonSerializerOptions.Converters.Add(
  new JsonStringEnumMemberConverter(
  options: new JsonStringEnumMemberConverterOptions(deserializationFailureFallbackValue: null),
  typeof(Sqlbi.Bravo.Models.DiagnosticMessageSeverity),
  typeof(Sqlbi.Bravo.Models.DiagnosticMessageType),
  typeof(Sqlbi.Bravo.Models.ExportData.ExportDataStatus),
  - typeof(Sqlbi.Bravo.Models.AnalyzeModel.AppFeature),
  typeof(Sqlbi.Bravo.Infrastructure.Contracts.PBICloud.CloudWorkspaceType),
  typeof(Sqlbi.Bravo.Infrastructure.Contracts.PBICloud.CloudWorkspaceCapacitySkuType),
  typeof(Sqlbi.Bravo.Infrastructure.Contracts.PBICloud.CloudSharedModelWorkspaceType),
  