FX.71 BimCraft test "dimensions retain IDs across redo, type swaps, flips, curves and rebinds" fails (tools/bimcraft-test/wall-precision.test.mjs)

Found 2026-11-05 while running the BimCraft suites for the join record (FX.60). node bin/test-bimcraft.mjs --walls: 6 of 7 pass; this one fails at wall-precision.test.mjs:65, after Undo then Redo of a saved wall dimension its GlobalId is a different one (readWallDimensions(...)[0].guid !== d.guid). It fails the same with the join sync switched off, so it is not from the join work; cause not looked into (a redo that runs the op again and makes a new GlobalId for the dimension is the likely shape). Wanted: Redo of a dimension keeps its id, like Redo of a wall type does (the test's first redo passes). Not started.

walls-09 2026-11-06: Cause found: the CODE was wrong, not the test. saveWallDimension's op (wall-dimensions.js operation) drew a fresh GlobalId each time it ran, so Redo made the dimension again under a new id. It now hands out the same GlobalIds again on Redo, as model-ops.js op() does. node bin/test-bimcraft.mjs --walls: 15/0 (was 14/1).