feat: Add tracing hook. #2557

Job	Run time
contract-tests	2m 38s
build-test	5m 35s
contract-tests-curl	3m 15s
build-test-curl	5m 22s
build-test-client-windows-curl	16m 20s
build-test-client-mac-curl	12m 1s
build-test-client-mac	7m 29s
build-test-client-windows	14m 20s
	1h 7m 0s

Provide feedback