Refactor Graph to speed up compile times #427

Job	Run time
build-devcontainer	5m 31s
build (Debug, windows-latest)	6m 0s
build (Debug, ubuntu-latest)	4m 29s
build (Debug, macOS-latest)	5m 39s
build (Release, ubuntu-latest)	4m 29s
build (Release, macOS-latest)	6m 12s
build (Release, windows-latest)	6m 5s
	38m 25s

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