Fixes for assembling correct messages for gravity ads request #5323

Job	Run time
build-and-check	2m 46s
test-cli	1m 11s
test-packages/billing	46s
test-.agents	40s
test-web	49s
test-integration-.agents	40s
test-packages/internal	48s
test-integration-packages/internal	40s
test-integration-common	40s
test-sdk	44s
test-packages/agent-runtime	55s
test-integration-cli	40s
test-integration-packages/agent-runtime	41s
test-integration-packages/billing	39s
test-integration-sdk	46s
test-integration-web	40s
test-common	37s
	14m 42s

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