Published fragment Honest health checks that hit the database.

errGroup, ctx := errgroup.WithContext(ctx)

errGroup.Go(func() error { return checkDatabase(ctx, svc.Begin) })
errGroup.Go(func() error { return checkDatabase(ctx, svc.BeginEphemeral) })

if err := errGroup.Wait(); err != nil {
    return nil, apierror.NewServiceUnavailableErrorf(ctx, "Health check error: %v.", err)
}