fix(auth): close Windows remediation review findings

tools/tht/internal/backup/fixture_security_unix_test.go

@@ -0,0 +1,9 @@
+//go:build !windows
+
+package backup
+
+import "testing"
+
+func prepareBackupFixturePrivatePaths(t *testing.T, directories, files []string) {
+	t.Helper()
+}