feat: Add tracing hook. #2549

Job	Run time
build-test-curl	7m 34s
contract-tests	2m 57s
contract-tests-curl	2m 45s
build-test	5m 29s
build-test-client-windows	18m 0s
build-test-client-mac	9m 38s
build-test-client-mac-curl	9m 21s
build-test-client-windows-curl	15m 11s
	1h 10m 55s

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