Fix freebuff grace-period hang where UI looks stuck streaming (#518) #6153

Job	Run time
build-and-check	2m 58s
test-integration-packages/internal	58s
test-integration-packages/billing	1m 10s
test-integration-common	38s
test-integration-web	39s
test-integration-cli	39s
test-integration-packages/agent-runtime	53s
test-integration-sdk	1m 20s
test-.agents	48s
test-packages/internal	50s
test-packages/agent-runtime	53s
test-web	1m 51s
test-common	38s
test-sdk	44s
test-packages/billing	51s
test-cli	55s
	16m 45s

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