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/log/log.go

@@ -84,6 +84,7 @@ func getCaller(skip int) string {
 	if !ok {
 		return "unknown"
 	}
+
 	return fmt.Sprintf("%s:%d", filepath.Base(file), line)
 }
 
@@ -94,6 +95,7 @@ func Fatal(msg string, args ...any) {
 		args = append(args, "caller", getCaller(2))
 		logger.Error(msg, args...)
 	}
+
 	os.Exit(1)
 }
 
@@ -172,6 +174,7 @@ func With(args ...any) *slog.Logger {
 	if logger != nil {
 		return logger.With(args...)
 	}
+
 	return slog.Default()
 }