ci: upload download link audit results as an artifact

[claude]

Requested by Samuel Attard · Slack thread

Before: the results of the nightly download-link check (the broken-links table or the "no broken links" note) only exist on the workflow run's step summary page, which is not retrievable through any GitHub API — so automated tooling and agents cannot read the findings.

After: the same findings markdown is also uploaded as a build artifact named audit-results, downloadable via the GitHub API. The upload uses archive: false, so the artifact is a single raw file listed under the file name audit-results.md, and the REST artifact endpoint serves the raw markdown directly — no zip extraction needed. The step summary, exit code, and all other behavior are unchanged.

How: immediately before await core.summary.write() (which empties the summary buffer), the script writes the buffered markdown to audit-results.md via core.summary.stringify(). A new actions/upload-artifact step (pinned to the same SHA the repo already uses in release.yml, v7.0.1) uploads that file with archive: false and if: always() so the artifact is produced whether or not broken links were found and the step failed.

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Generated by Claude Code

[coveralls]

coverage: 87.352%. remained the same — audit-results-artifact into main