feat: Add tracing hook. #2561

Job	Run time
contract-tests	3m 4s
build-test	5m 37s
contract-tests-curl	3m 10s
build-test-curl	7m 30s
build-test-client-mac	8m 25s
build-test-client-mac-curl	11m 43s
build-test-client-windows	17m 28s
build-test-client-windows-curl	16m 27s
	1h 13m 24s

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