PR: Export ignoring V/G settings Detail Level

### Problem Description

When exporting from Revit Exporter ignores settings in V/G "Detail Level"

No matter what you set up here (Coarse/Medium/Fine) it always exports as "By View"

This causes problems and mistakes when designers setup specific 3D View using these settings for IFC export,
because IFC export does not correspond with the 3D View Revit visibility / settings.

In example there are doors with hardware provided, where hardware is only visible in "Fine".

As long as 3D View "Detail Level" is set to fine it always export Hardware, even if whole Doors Category is set to "Medium" or "Coarse" through V/G settings.
Works the same in opposite direction (if View is set to Coarse - it ignores V/G settings of categories for Medium/Fine....

Only way not to export Hardware is to completely turn off "Subcategory".

**Is that ignorance of "Detail Level" parameter in V/G there on purpose os is that a bug?**

Thx

**Fine View**

**Fine View + V/G settings to Medium**

### Revit Version

2026.0.x

### IFC for Revit Addon Version

26.1.0

### Windows Version

11 24H2

Reproduce the export with Revit 2026.0.x and IFC for Revit 26.1.0 using a 3D view whose V/G category Detail Level differs from the view's overall Detail Level. Compare Coarse, Medium, and Fine settings, including door hardware visibility; done means IFC export follows the category V/G settings rather than always using the overall view setting.

Written by the indexing model from the issue text.