Hojun-Cho
8a9be47f65
The four graduated pin families byte-compared under test-data-byteid but their original fixtures masked the miscompiles at runtime (lone frame slot, dead code path, pointer accident). Add the discriminating programs as run fixtures: adjacent-element clobber for the 2-byte deref store, second-variant match dispatch for fn-type dedup, payload integrity across the tagged widen of a padded struct, and base64 clear() actually zeroing its buffers. Corpus pins move to 1,229 fixtures / 137 run / 766 run-exit / 2,458 cells with the new identity hash; the data-byteid floor moves to 915.