Add compliant event handler as extra, for use in other languages #907

Job	Run time
samples (Release, windows-2022)	10m 7s
samples (Release, ubuntu-24.04)	6m 3s
samples (Release, macos-latest)	2m 21s
samples (Debug, ubuntu-24.04)	4m 48s
samples (Debug, macos-latest)	1m 37s
samples (Debug, windows-2022)	2m 27s
	27m 23s

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