[codex] Add Carbon fallback for CLI ads (#541) #6236

Job	Run time
build-and-check	3m 6s
test-integration-packages/internal	1m 7s
test-integration-packages/billing	1m 7s
test-integration-packages/agent-runtime	52s
test-integration-cli	41s
test-integration-sdk	1m 19s
test-integration-web	41s
test-integration-common	39s
test-cli	52s
test-packages/billing	43s
test-.agents	43s
test-packages/agent-runtime	53s
test-sdk	44s
test-web	1m 14s
test-packages/internal	47s
test-common	51s
	16m 19s

Provide feedback