After sp5 merge with -X theirs, two compile errors needed manual fix:
- gpu_her.rs lost the DevicePtrMut trait import
- gpu_tlob.rs Fix 20 regression test used the 4-arg adam_step signature
before sp5's Pearl 4 added β1/β2/ε params.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>