Improve freebuff request throughput (#651) #6591

Job	Run time
build-and-check	3m 7s
test-integration-packages/internal	1m 14s
test-integration-packages/billing	1m 8s
test-integration-sdk	1m 16s
test-integration-packages/agent-runtime	51s
test-integration-web	45s
test-integration-common	45s
test-packages/agent-runtime	47s
test-integration-cli	40s
test-common	46s
test-sdk	46s
test-.agents	56s
test-packages/billing	44s
test-cli	1m 7s
test-packages/internal	50s
test-web	1m 1s
	16m 43s

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