STEP: Export doesn't work correct with Draft OrthoArray - missing objects

### Problem description

Based on [this](https://forum.freecad.org/viewtopic.php?t=101924) forum post (German).

[tn1031.FCStd.zip](https://github.com/user-attachments/files/24272964/tn1031.FCStd.zip)

The attached file was exported to STEP and IGES with different export settings (without an effect).

The re-import by the author (Thomas Neemann) shows, that not all exported objects are re-imported.

A quick look with an external STEP/IGES-Viewer shows, that the exported STEP file doesn't contain all the FreeCAD objects. The IGES file does.

File in FreeCAD:

Exported STEP file in openSTEPViewer

Exported IGES file in openSTEPViewer

### Workbench affected?

Core (App, Gui,...)

### Steps to reproduce

open the file

select the top array

export to STEP/IGES

re-import into FreeCAD or use an external viewer

### Expected behavior

Export all objects.

### Actual behavior

Exports only a subset of all objects.

### Development version About Info (in Safe Mode)

```shell
OS: macOS 15.7.2
Architecture: x86_64
Version: 1.2.0dev.20251216 (Git shallow)
Build date: 2025/12/16 18:08:50
Build type: Release
Branch: (HEAD detached at 8fd81d4)
Hash: 8fd81d41094d90ebdb9b7e489c1e634884b7c4c1
Python 3.11.14, Qt 6.8.3, Coin 4.0.3, Vtk 9.3.1, boost 1_86, Eigen3 3.4.0, PySide 6.8.3
shiboken 6.8.3, xerces-c 3.3.0, IfcOpenShell 0.8.2, OCC 7.8.1
Locale: German/Germany (de_DE)
Navigation Style/Orbit Style/Rotation Mode: Touchpad/Rounded Arcball/Window center
Stylesheet/Theme/QtStyle: FreeCAD.qss/FreeCAD Light/
Logical DPI/Physical DPI/Pixel Ratio: 72/127.75/2
Installed mods:
* Curves 0.6.70
```

### Last known good version (optional)

```shell

```