cointegrated/rubert-tiny fine-tuned end-to-end: pair ordering 0.933-0.970
(+0.56-0.78 margin, in-pool) beats every from-scratch config, but the
held-out capability-question family fires 126/126 as action on all 18
config/seeds (FA_rate 1.000, mean proba 0.86-0.99, family σ 0.0045). tiny2
ceiling (newer, larger vocab) does not move LOFO (1.000) and is worse
in-pool. sparse 0.667 remains the safety floor; supervised encoder scaling
ruled out for the generator boundary.
