Address spec review issues: add third call site (Fill groupParts),
reuse ComputeCandidateRotations, fix step ordering for ToNestParts
before scoring, cap N to 500 and item.Quantity, clarify BoundingBox
is a property.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Spec for adding NFP-based placement as a competing strategy
in NestEngine.FindBestFill() for non-rectangular parts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
aj