Add `ObserveHasAnyDatoms` #328

Job	Run time
build-and-test / Build and Test (ubuntu-latest)	1m 52s
build-and-test / Build and Test (windows-latest)	3m 51s
build-and-test / Build and Test (macos-latest)	2m 11s
build-and-test / Build and Test (macos-13)	3m 32s
	11m 26s

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