Tweak base2-gpt-5 worker #3981

Job	Run time
build-and-check	2m 26s
test-integration-backend	37s
test-integration-cli	32s
test-integration-common	36s
test-integration-.agents	31s
test-integration-npm-app	32s
test-integration-packages/agent-runtime	34s
test-integration-web	31s
test-backend	31s
test-npm-app	33s
test-cli	35s
test-.agents	32s
test-common	31s
test-packages/agent-runtime	42s
test-web	33s
	10m 16s

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