feat(billing): use advisory locks for credit operations #5522

Job	Run time
build-and-check	2m 30s
test-integration-packages/billing	1m 6s
test-integration-cli	46s
test-integration-sdk	47s
test-integration-common	39s
test-integration-packages/internal	2m 11s
test-integration-web	41s
test-integration-packages/agent-runtime	42s
test-cli	1m 9s
test-sdk	51s
test-common	37s
test-.agents	44s
test-web	55s
test-packages/billing	1m 11s
test-packages/agent-runtime	54s
test-packages/internal	1m 2s
	16m 45s

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