feat!: Flexible checksum v2 #1317

Job	Run time
linux (jammy, 5.9)	12m 1s
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	13m 25s
linux (jammy, 6.0)	11m 40s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	12m 49s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	14m 42s
linux (amazonlinux2, 5.9)	28s
linux (amazonlinux2, 6.0)	38s
apple (macos-14, Xcode_15.2, platform=macOS)	12m 38s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	10m 53s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	12m 40s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	14m 28s
apple (macos-15, Xcode_16.1, platform=macOS)	9m 39s
	2h 6m 1s

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