add N8N_PROTOCOL=https and N8N_HOST — required for HF Spaces

delete all custom code — bare n8n only

downgrade to n8n 2.27.5 + align Python runner to same tag — fixes NDV store crash on workflow creation and EIO from task runner version mismatch

suppress EIO socket errors from CDN idle-connection drops

fix: only rate-limit requests with wrong credentials, not unauthenticated browser requests

Fix: strip X-Forwarded-For in proxy before forwarding to n8n

Initial deploy: n8n with auth proxy and PostgreSQL