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/database/chunks_ext.go

@@ -19,6 +19,7 @@ func (r *ChunkRepository) List(ctx context.Context) ([]*Chunk, error) {
 	defer CloseRows(rows)
 
 	var chunks []*Chunk
+
 	for rows.Next() {
 		var chunk Chunk