Convert records to classes #375

Job	Run time
build (ubuntu-latest, Debug)	2m 54s
build (macos-latest, Debug)	6h 0m 18s
build (macos-latest, Release)	1m 51s
build (windows-latest, Release)	3m 29s
build (ubuntu-latest, Release)	2m 23s
build (windows-latest, Debug)	4m 56s
publish-coverage	0s
	6h 15m 51s

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