Nginx Proxy Manager

Nginx Proxy Manager API wrapper — snapshot proxy hosts / redirection hosts / certificates, upsert proxy hosts idempotently (match by domain set), and delete proxy hosts by id.

Adds upsertProxyHost (idempotent create/update; matches by exact set of domainNames) and deleteProxyHost (DELETE /api/nginx/proxy-hosts/{id}, non-throwing). New resources: upsert_result, delete_result. Defaults follow NPM UI sensible-defaults (block_exploits, allow_websocket_upgrade).