Improve freebuff request throughput #6586

Job	Run time
build-and-check	3m 14s
test-integration-packages/billing	1m 7s
test-integration-packages/internal	1m 2s
test-integration-packages/agent-runtime	44s
test-integration-common	51s
test-integration-cli	40s
test-integration-web	43s
test-common	39s
test-integration-sdk	1m 21s
test-packages/internal	58s
test-packages/billing	43s
test-web	51s
test-cli	54s
test-sdk	54s
test-packages/agent-runtime	53s
test-.agents	51s
	16m 25s

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