pub fn snapshot_solids(solids: &[(&str, &BrepSolid)]) -> Result<String, String>Expand description
Serialize (name, solid) pairs into one base64 snapshot payload. Captures
each entity’s OWN scene-metadata record (solid name + every face/edge name)
alongside the geometry, so a stamped part restores with its metadata. The
payload is byte-deterministic for identical input (solids in caller order,
metadata sorted by name).