feat(engine): add private NDC nodes and ontology bridge

packages/n8n-nodes-ndc/nodes/shared/errors.ts

@@ -0,0 +1,17 @@
+export function safeInputError(error: unknown, fallback: string): Error {
+  const message = error instanceof Error ? error.message : '';
+  const normalized = /^[a-z0-9_.:-]{3,160}$/i.test(message) ? message : fallback;
+  return new Error(normalized);
+}
+
+export function safeHttpError(error: unknown, fallback: string): Error {
+  const source = error && typeof error === 'object' ? error as Record<string, unknown> : {};
+  const response = source.response && typeof source.response === 'object'
+    ? source.response as Record<string, unknown>
+    : {};
+  const candidate = Number(source.statusCode ?? source.status ?? response.statusCode ?? response.status);
+  const suffix = Number.isInteger(candidate) && candidate >= 100 && candidate <= 599
+    ? `_http_${candidate}`
+    : '';
+  return new Error(`${fallback}${suffix}`);
+}