feat!: Flexible checksum v2 #4189

Job	Run time
linux (jammy, 5.9)	10m 4s
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	10m 24s
linux (jammy, 6.0)	10m 2s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	15m 5s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	11m 40s
apple (macos-14, Xcode_15.2, platform=macOS)	11m 3s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	7m 49s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	6m 54s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	7m 16s
apple (macos-15, Xcode_16.1, platform=macOS)	9m 18s
	1h 39m 35s

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