Rate limit error: 429 too many certificates (5) issued for harbor.dvirlabs.com
Must wait until March 23, 2026 07:00:21 UTC before using production again.
Changes:
- Created letsencrypt-staging ClusterIssuer
- Updated Harbor to use staging issuer temporarily
- Deleted failed certificate resources
After March 23, change cert-manager.io/cluster-issuer back to 'letsencrypt'
