feat(NFC): skip Unicode pass for all-ASCII inputs #1000

Job	Run time
musllinux (ubuntu-latest, x86_64)	2m 10s
windows (windows-latest, x64, x64)	4m 5s
musllinux (ubuntu-latest, aarch64)	2m 23s
sdist	26s
macos (macos-15-intel, x86_64)	3m 17s
windows (windows-latest, x86, x86)	4m 4s
musllinux (ubuntu-latest, x86)	2m 0s
windows (windows-11-arm, aarch64, arm64)	2m 45s
musllinux (ubuntu-latest, armv7)	2m 0s
macos (macos-14, aarch64)	1m 6s
linux (ubuntu-latest, x86_64, x86_64-unknown-linux-gnu)	2m 2s
linux (ubuntu-latest, x86, i686-unknown-linux-gnu)	3m 14s
linux (ubuntu-latest, ppc64le, powerpc64le-unknown-linux-gnu)	2m 19s
linux (ubuntu-latest, aarch64, aarch64-unknown-linux-gnu)	2m 44s
linux (ubuntu-latest, armv7, armv7-unknown-linux-gnueabihf)	2m 13s
linux (ubuntu-latest, s390x, s390x-unknown-linux-gnu)	2m 41s
linux (ubuntu-latest, riscv64, riscv64gc-unknown-linux-gnu)	2m 28s
Release	0s
	41m 57s

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