load_file() is mmap-based; a cache file with a readable header but damaged
data region crashes the whole process with a Windows fatal 'page error'
(uncatchable). Read the file as plain bytes and parse with safetensors.torch.load
so the same damage surfaces as OSError -> existing except returns {} -> caller
falls back to re-fuse. Verified: broken cache returns empty dict (no crash),
good cache still loads fully.
ussoewwin