feat!: Flexible checksum v2 #1293

Job	Run time
linux (jammy, 5.9)	11m 13s
linux (jammy, 6.0)	11m 17s
linux (amazonlinux2, 5.9)	10m 53s
linux (amazonlinux2, 6.0)	12m 9s
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	18m 57s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	16m 32s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	19m 58s
apple (macos-14, Xcode_15.2, platform=macOS)	15m 16s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	10m 21s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	9m 10s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	11m 31s
apple (macos-15, Xcode_16.1, platform=macOS)	9m 34s
	2h 36m 51s

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