public static Task <DbContext> GetDbContextAsync(this IDbOperationScope scope, CancellationToken cancellationToken = default)
 => scope.GetDbContextAsync(true, cancellationToken);
 public static Task <TDbContext> GetDbContextAsync <TDbContext>(this IDbOperationScope <TDbContext> scope, CancellationToken cancellationToken = default)
     where TDbContext : DbContext
 => scope.GetDbContextAsync(true, cancellationToken);