v0.15.0

BREAKING CHANGE

• flopscope 0.11.0 moves FLOPs the GRADER charges for calls
  that already ran, so scored submissions need re-evaluation, not only a
  re-baseline. The >52-letter contraction fallback now bills the honest FMA
  count, so tensordot calls built on singleton-axis padding bill ~2x, and ix_
  moves from a shipped weight of 0.0 to 1.0. Separately, non-numeric dtypes
  (object, str, bytes, datetime64, timedelta64, structured/void) now raise
  UnsupportedDtypeError wherever they reach a metered op, on a numeric
  allowlist. Results from linalg/cross/outer/contraction/fft/bmat are now
  wrapped so downstream arithmetic is billed locally; that raises the
  in-process estimate onto what the grader already charged and implies no
  re-evaluation.

Feat

• deps: adopt flopscope 0.11.0 and re-cap at <0.12.0

Fix

• runner: honor wall limit before transport timeout