Shay
65405f1128
feat(derivation): Gate A2a unit partition injection (#809)
* feat(derivation): Gate A2a unit partition injection
Add typed unit_partition primitive with PartitionChunk/result_unit
contract, recognizer-injector bridge, DCS yield guard, and pronoun
lookback support. Closes unit_partition recognized_no_injection on live
train_sample (0002 partition stmt reclassifies); wrong=0 preserved.
* test(gsm8k): harden unit partition confusers
* test(gsm8k): add unit partition pronoun safety regressions
* chore(gsm8k): fix unit partition exemplar file ending
* chore(derivation): type unit partition solution step operand