Summary

EUS upgrade test fails when resolving IIB; KeyError on missing 'iib' key in cnv-tests.

Steps to reproduce

1. Trigger dev EUS upgrade job: dev-test-upgrade-cnv-eus-4.16-lbednar
2. Cluster: lbednar3 (rhos-psi.cnv-qe.rhood.us)
3. Console log: https://jenkins-csb-cnvqe-main.dno.corp.redhat.com/job/dev-test-upgrade-cnv-eus-4.16-lbednar/3/consoleFull

Actual result

Job fails with KeyError: 'iib' in cnv-tests:

File "/cnv-tests/tests/install_upgrade_operators/product_upgrade/utils.py", line 668, in get_successful_fbc_build_iib
  return build["iib"]
KeyError: 'iib'

Test: tests/install_upgrade_operators/product_upgrade/test_eus_upgrade.py::TestEUSToEUSUpgrade::test_eus_upgrade_process

Expected result

IIB lookup should succeed and EUS upgrade flow should continue.

Notes

Observed in build #3 of dev-test-upgrade-cnv-eus-4.16-lbednar. Results publishing looks OK; failure is in IIB lookup logic.