Add 7 new operations: modify-field, modify-filter, modify-dataParameter,
clear-selection, clear-order, clear-filter, add-dataSetLink, set-structure.
Add selection dedup for add-field/add-calculated-field and order dedup
for add-order. Fix SetAttribute output leak.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>