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6ba27a8c17
- Redesign seam detection/pairing to be connectivity-derived (`SeamPair()` walks sibling coedges on the same face with opposite orientations), with seam halves now present in wire `CoEdgeRefIds` to match TopoDS iteration. - Move geometric continuity storage/round-trip to `BRepGraph_LayerRegularity` (including seam continuity), updating populate/reconstruct/editor APIs accordingly. - Add/adjust GTests to cover seam ordering, seam symmetry, layer regularity behavior, and split/compact/reconstruct interactions under the new model.