Apply mechanical lint fixes for golangci-lint v2.12.2 rollout

Auto-remediate style-only findings (wsl_v5, nlreturn, noinlineerr,
modernize, intrange, perfsprint, usetesting, unconvert, errorlint,
gocritic, testifylint) and rename printf-style helpers to f-suffixed
names (goprintffuncname): ui.Writer message methods, cli.ReportErrorf,
database.Fatalf, vaultik stdoutf.

internal/storage/s3.go

@@ -30,6 +30,7 @@ func (s *S3Storer) PutWithProgress(ctx context.Context, key string, data io.Read
 	if progress != nil {
 		s3Progress = s3.ProgressCallback(progress)
 	}
+
 	return s.client.PutObjectWithProgress(ctx, key, data, size, s3Progress)
 }
 
@@ -44,6 +45,7 @@ func (s *S3Storer) Stat(ctx context.Context, key string) (*ObjectInfo, error) {
 	if err != nil {
 		return nil, err
 	}
+
 	return &ObjectInfo{
 		Key:  info.Key,
 		Size: info.Size,
@@ -65,6 +67,7 @@ func (s *S3Storer) ListStream(ctx context.Context, prefix string) <-chan ObjectI
 	ch := make(chan ObjectInfo)
 	go func() {
 		defer close(ch)
+
 		for info := range s.client.ListObjectsStream(ctx, prefix, false) {
 			ch <- ObjectInfo{
 				Key:  info.Key,
@@ -73,6 +76,7 @@ func (s *S3Storer) ListStream(ctx context.Context, prefix string) <-chan ObjectI
 			}
 		}
 	}()
+
 	return ch
 }