[codex] Fix local agent discovery imports #6739

Job	Run time
build-and-check	2m 55s
test-integration-packages/billing	1m 4s
test-integration-packages/internal	1m 12s
test-integration-sdk	1m 27s
test-integration-common	40s
test-integration-packages/agent-runtime	50s
test-integration-web	40s
test-packages/billing	45s
test-integration-cli	40s
test-web	58s
test-.agents	40s
test-packages/agent-runtime	44s
test-cli	53s
test-sdk	47s
test-packages/internal	49s
test-common	52s
	15m 56s

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