Add compliant event handler as extra, for use in other languages #943

Job	Run time
samples (Release, ubuntu-24.04)	4m 10s
samples (Debug, macos-latest)	1m 11s
samples (Release, windows-2022)	4m 23s
samples (Debug, ubuntu-24.04)	3m 28s
samples (Debug, windows-2022)	1m 9s
samples (Release, macos-latest)	1m 33s
	15m 54s

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