n8n ingest pipeline canary test article

This is a canary test of the new n8n ingest pipeline. If you see this, the upsert endpoint is working end to end. It accepts JSON via x-api-key authentication, dedupes by sourceUrl, validates schema, merges into pulse-news.json, and triggers static page rebuild plus Cloudflare cache purge. The full content pipeline can now run from n8n without needing the Mac to be awake.