eval_lora.py: feeds a fine-tuned model the LEAN asm of held-out BANKED test fns, compiles its C,
compares to the corpus target reloc-masked (banked fns have no .s — corpus carries the asm). Validated:
known-good corpus C scores MATCH vs its own asm. train_lora --max-steps for smoke runs. GPU confirmed
(3080 Ti, torch 2.10+cu128); install + corpus-filter (638/75 clean pairs) done; smoke-train running.