AJ Isaacs e3b89f2660 perf(engine): add target count to ShrinkFiller with FillBestFit estimate ...

When a target count is known, ShrinkFiller now uses FillBestFit (fast
rectangle packing) to estimate how many parts fit on the full area,
then scales the shrink axis proportionally to avoid an expensive
full-area fill. Falls back to full box if estimate is too aggressive.

Also shrinks to targetCount (not full count) to produce tighter boxes
when fewer parts are needed than the area can hold.

IterativeShrinkFiller passes NestItem.Quantity as the target count.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-19 10:55:01 -04:00

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