feat: Add tracing hook. #2553

Job	Run time
contract-tests	4m 50s
contract-tests-curl	3m 18s
build-test	5m 51s
build-test-curl	5m 31s
build-test-client-mac	10m 15s
build-test-client-windows	16m 42s
build-test-client-windows-curl	17m 48s
build-test-client-mac-curl	9m 4s
	1h 13m 19s

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