Wrap the webhook HTTP send in a try/catch so a connection error returns
a clean failed result (reason: request_failed) instead of bubbling up as
a job failure — matching the HTTP request node.
Add tests for the gaps in node-run coverage:
- HTTP request: basic auth, PUT/PATCH/DELETE, non-2xx responses,
connection exceptions, and an items_path that doesn't resolve to a list.
- Webhook: every HTTP method, header expression resolution, and the new
connection-failure path.
- Fetch RSS: non-2xx feed responses, malformed XML, items without a
publish date (skipped), and the link fallback when an item has no guid.
- Delay: unknown unit throws.
- Publish: dry runs don't publish or queue.