message: Fix exception for GetDatabaseFromVpax on an empty model
diff: @@ -45,7 +45,7 @@ namespace Sqlbi.Bravo.Infrastructure.Helpers
  ETag = databaseETag,
  TablesCount = vpaModel.Tables.Count(),
  ColumnsCount = vpaModel.Columns.Count(),
  - TablesMaxRowsCount = vpaModel.Tables.Max((t) => t.RowsCount),
  + TablesMaxRowsCount = vpaModel.Tables.Any() ? vpaModel.Tables.Max((t) => t.RowsCount) : 0,
  DatabaseSize = databaseSize,
  ColumnsUnreferencedCount = vpaModel.Columns.Count((t) => t.IsReferenced == false),
  Columns = vpaModel.Columns.Select((c) =>
  