429 Errors in dev.gitlab.org Causing CNG Build Pipeline Job Failures

Starting 2025-09-22, it was observed that different jobs across multiple CNG build pipelines failed with the error:

WARNING: Downloading artifacts from coordinator... failed  correlation_id=01K5TYSMCHJV2WXTS4B1EBBRA8 host=dev.gitlab.org id=30821250 responseStatus=429 Too Many Requests status=429 Too Many Requests token=64_pdK2hw

Example jobs that have failed this way:

• https://dev.gitlab.org/gitlab/charts/components/images/-/jobs/30822695
• https://dev.gitlab.org/gitlab/charts/components/images/-/jobs/30807191