Task 5 of the whole-job engine API: add a geometry safety gate that
validates every candidate trial before the runner commits accounting.
- NestJobPlacementValidator: closed-contour validity, rotation-policy
compliance, work-area containment per quadrant, hole-aware material
overlap, and required part spacing. Overlap is interior-only, so
zero-clearance edge/corner contact remains a valid placement.
- NestJobValidator: route candidate validation through the geometry
gate; reject unusable/unclosed/degenerate contours up front.
- NestJobRunner: wrap candidate evaluation in a progress bridge that
tags legacy engine detail with the current candidate context.
- LegacyPlateNesterAdapter: forward IProgress to the legacy engine so
its progress surfaces under the active candidate.
- Tests: geometry (quadrants, rotations, touching, containment, holes,
empty stock, real Default/Strip smoke), validation, and cancellation
suites; repaired test fakes that emitted out-of-bounds or overlapping
placements the gate now correctly rejects.
Engine.Tests: 70 passed, 0 failed, 0 skipped in Debug and Release.
Windows-only OpenNest.Tests not run on Linux.
aj