Full staging/zip/cleanup contract works; generate-alphas dies in GVM with
'MPSNDArray buffer is not large enough. Must be 59768832 bytes' on BOTH
m1ultra and m3ultra, any input dims, torch or mlx backend, gpu or cpu post.
GVM --device cpu wrote 0 frames in 3.5h (hung). Weights installed both nodes
(gvm_core/weights, 6GB). Next: either debug GVM's torch-MPS path or replace
the alpha-hint stage with the corridorkey-mlx fork / bg_remove_local hints.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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