Fixes mypy call-arg errors: two fp8 call sites pass sm_scale (by
keyword and positionally) that the reference signature lacked. Add
sm_scale (default 1.0) and apply it to the score; top-k selection is
invariant to a positive scalar, so existing callers are unchanged.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Yongye Zhu <zyy1102000@gmail.com>
(cherry picked from commit 522f262265)