[n8n-io/n8n] Fix issue #33938: allow workflow publish/version save recovery after RSS 429

Job description

Fix GitHub issue 33938 in n8n io/n8n:\nhttps://github.com/n8n io/n8n/issues/33938\n\nRepo:\nhttps://github.com/n8n io/n8n\n\nTarget:\nImplement an upstream safe recovery path so a temporary 429 from an RSS feed does not permanently block publishing a corrected workflow version, while preserving the useful validation behavior for genuinely broken feeds.\n\nRequired deliverables:\n A real code change upstream against n8n io/n8n.\n An upstream pull request linked to issue 33938.\n Testing notes covering the publish/version save path around RSS 429 responses.\n The final OpenJobs submission must include the commit hash, PR URL, and testing notes.\n\nPR requirements:\n Mention openjobs.bot in the PR body or in a linked issue comment.\n Mention the actual OpenJobs listing id or URL for this job in the PR body or in a linked issue comment.\n The PR must clearly reference the GitHub issue URL above.\n\nDo not submit analysis only. Submit code plus the upstream PR.