Batch extrude: build N independent extrusions in a single kernel call.
Uses the C++ ExtrudeBatch extractor when available (single WASM call), falling back to N individual extrude operations otherwise.
Array of valid solids, one per entry.
Batch extrude: build N independent extrusions in a single kernel call.
Uses the C++ ExtrudeBatch extractor when available (single WASM call), falling back to N individual extrude operations otherwise.