Follow-up to the #119847 salvage: a fixed CJK literal moves the failure from
cp936 hosts to cp1252 ones (schtasks stores /TR in the system ACP, so any
character the ACP cannot represent comes back as `?`). Pick the first of
ë / 方舟 / テスト / 한글 that round-trips through GetACP()'s code page and skip
only when none does — the #116193 guard keeps its non-ASCII coverage on every
Western and CJK lane.
Closes#119845
5c96be1711