vine: reserve a factor of disk when allocating resources #495

Job	Run time
build-conda-macos-x86_64 (macos-14)	4m 44s
build-conda-linux	6m 19s
build-conda-macos-x86_64 (macos-13)	9m 19s
build-native-linux (almalinux8)	6m 16s
build-conda-macos-arm64 (macos-14)	5m 9s
build-native-linux (almalinux9)	7m 15s
build-native-linux (ubuntu20.04)	5m 29s
lint	40s
build-native-linux (ubuntu22.04)	5m 26s
build-native-linux (ubuntu24.04)	6m 57s
	57m 34s

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