[codex] Restore subagent alias card matching #6477

Job	Run time
build-and-check	2m 55s
test-integration-packages/billing	1m 8s
test-integration-cli	47s
test-integration-packages/internal	1m 19s
test-integration-common	47s
test-packages/internal	50s
test-.agents	48s
test-web	1m 7s
test-integration-sdk	1m 29s
test-sdk	52s
test-integration-packages/agent-runtime	40s
test-packages/billing	44s
test-common	54s
test-packages/agent-runtime	45s
test-integration-web	42s
test-cli	49s
	16m 36s

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