[codex] Configure freebuff agents by model #6480

Job	Run time
build-and-check	2m 32s
test-integration-packages/internal	1m 12s
test-integration-packages/billing	1m 1s
test-integration-packages/agent-runtime	47s
test-integration-sdk	1m 23s
test-integration-web	57s
test-integration-cli	43s
test-packages/agent-runtime	46s
test-cli	52s
test-web	1m 51s
test-sdk	43s
test-packages/internal	45s
test-.agents	50s
test-common	45s
test-packages/billing	43s
test-integration-common	45s
	16m 35s

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