Variable splitOversizedGeometryConst

splitOversizedGeometry: Fix = ...

Auto-fix for GEOMETRY_ARRAY_OVERSIZED — geometries whose raw positionsCompressed, indices, normalsCompressed, or uvsCompressed array lengths exceed the configured per-geometry batch-portion thresholds.

Mechanically identical to splitDenseGeometry and splitLargeGeometry: splits the targeted geometry once via splitSceneGeometry (whole-triangle midpoint partition), fans every referencing SceneMesh onto the two pieces, destroys the source. Only the trigger condition differs — this strategy targets geometries whose array lengths would trip the WebGLRenderer's GPUMemoryBatch.addMesh portion-allocation guard at upload time.

One split per apply. A piece that still exceeds any of the configured array-length thresholds after this single split is flagged again on the next inspection pass; an outer loop (or optimizeSceneModel) re-runs applyFixes until the report converges. Matches the rest of the geometry-split fixes — IDE-style "one fix = one specific action".