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HalfEdgeMap reports wrong unmatchedEdges count for geometries with duplicated vertices at shared edges

HalfEdgeMap reports wrong unmatchedEdges count for geometries with duplicated vertices at shared edges: a task in LegoFlow-SWE (Harbor dataset). Problem When a HalfEdgeMap instance is built from a geometry that has duplicated vertices at the same position (for example, two triangles sharing an…

The task

**Problem** When a `HalfEdgeMap` instance is built from a geometry that has duplicated vertices at the same position (for example, two triangles sharing an edge but using different vertex indices for the same coordinates), the `unmatchedEdges` property counts all edges as unmatched, even though they should be…

Part of Lego-X/LegoFlow-SWE.