[codex] Fix local agent discovery imports (#738) #6755

Job	Run time
build-and-check	2m 51s
test-integration-packages/internal	1m 11s
test-integration-packages/billing	1m 2s
test-integration-packages/agent-runtime	39s
test-integration-cli	40s
test-integration-sdk	1m 32s
test-integration-common	39s
test-integration-web	51s
test-packages/billing	45s
test-.agents	53s
test-packages/internal	46s
test-cli	59s
test-packages/agent-runtime	45s
test-common	51s
test-sdk	42s
test-web	1m 7s
	16m 13s

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