feat: Add tracing hook. #2560

Job	Run time
contract-tests-curl	2m 46s
contract-tests	3m 7s
build-test-client-windows-curl	17m 17s
build-test	6m 26s
build-test-curl	5m 31s
build-test-client-mac	12m 13s
build-test-client-windows	15m 21s
build-test-client-mac-curl	11m 12s
	1h 13m 53s

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