feat!: Flexible checksum v2 #1476

Job	Run time
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	17m 48s
linux (jammy, 5.9)	12m 29s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	14m 44s
linux (jammy, 6.0)	12m 29s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	16m 39s
apple (macos-14, Xcode_15.2, platform=macOS)	13m 39s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	10m 51s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	8m 25s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	11m 48s
apple (macos-15, Xcode_16.1, platform=macOS)	8m 57s
	2h 7m 49s

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