actionchain: ingest failure: trufflehog (upstream broken) #4782
Description
All 6 CI failures are caused by a transient GitHub infrastructure outage. Every run failed at the "Fetching the repository" step with "remote: Internal Server Error" / "fatal: unable to access 'https://github.com/dlorenc/actionchain/': The requested URL returned error: 500". GitHub's git server returned HTTP 500 errors consistently across all 6 runs (with 3 retries each). No test code was executed - the failures occurred before any checkout completed. This is an infrastructure issue that cannot be fixed by modifying test or action code.