[SEV-1] Automated rollback: Deploy - Frontend to Vercel and Artifacts failure (5739c8a)

[github-actions]

Automated deploy failure

Field	Value
Severity	SEV-1
Workflow	Deploy - Frontend to Vercel and Artifacts
Conclusion	failure
Failed SHA	5739c8a823cc83fc1460318068895e2b34348085
Ref	main
Actor	barry01-hash
Run	https://github.com/PromptMintLabs/prompt-mint/actions/runs/33201513437
Outcome	incident_only
Last known-good	none found

This ticket was opened by rollback automation. Do not close it until:

1. Production is serving the last known-good artifact (or a confirmed fix).
2. Health checks (/api/health, /api/status) pass.
3. A short incident timeline is added below.

See docs/operations/auto-rollback.md and docs/operations/deployment-runbook.md.