Plate-scoped cutting plan requests now record the plate's exact state at
capture, and CuttingPlanService.Apply installs Ready, replayed proposals
for a whole scope at once:
- Any change after capture (order, pose bits, program reference or
in-place content, drawing program, lock/lead-in flags, settings,
quantity, size, quadrant or cutoff definitions) returns Stale with
nothing changed.
- Order changes without PartAdded/PartRemoved, so drawing quantities and
sentinel plates are untouched; ObservableList.Reorder exposes the same
operation and Plate.PartsReordered is raised once per changed plate.
- Regenerated parts receive owned copies of the replayed program and of
the settings captured with the request; fixed programs stay in place.
- An install failure restores every plate exactly; an observer failure
after publication is reported as a refresh error, not a rollback.
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