IFCALIGNMENT child elements not included in getSpatialStructure() result

[vovka236]

Describe the bug 📝

Environment

• @thatopen/components version: 3.3.2
• @thatopen/components-front version: 3.3.3
• @thatopen/fragments version: 3.3.6
• Browser: Chrome / Edge
• Model: IFC4x3 bridge model

When loading an IFC4x3 model containing IFCALIGNMENT with nested
IFCALIGNMENTHORIZONTAL / IFCALIGNMENTVERTICAL / IFCREFERENT elements, these child elements
are absent from the object returned by model.getSpatialStructure().
The elements exist in the model and are visible in BIMvision desktop 3.1.2
IFC structure tree, but do not appear in the getSpatialStructure() traversal.

Notably, calling model.getItemsOfCategories(SPATIAL_CATEGORIES) does return
these entities, confirming they are present in the model and recognized as
spatial categories - they are simply missing from the getSpatialStructure() tree.

Reproduction ▶️

No response

Steps to reproduce 🔢

Viadotto Acerno.zip

1. Load an IFC4x3 model containing IFCALIGNMENT with nested IFCALIGNMENTHORIZONTAL / IFCALIGNMENTVERTICAL
2. Call: const spatialStructure = await model.getSpatialStructure();
3. Traverse the returned tree
4. IFCALIGNMENTHORIZONTAL / IFCALIGNMENTVERTICAL and IFCREFERENT are not present

System Info 💻

System:
    OS: Windows 11 10.0.26200
    CPU: (24) x64 AMD Ryzen 9 7900X3D 12-Core Processor
    Memory: 10.77 GB / 31.12 GB
  Binaries:
    Node: 24.12.0 - C:\Program Files\nodejs\node.EXE
    npm: 11.12.1 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 148.0.7778.97
    Edge: Chromium (143.0.3650.75)
    Firefox: 145.0.2 - C:\Program Files\Mozilla Firefox\firefox.exe
    Internet Explorer: 11.0.26100.8115

Used Package Manager 📦

npm

Error Trace/Logs 📃

No response

Validations ✅

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