Files
OrcaSlicer-KX/src/libslic3r
Argo 7e63fce706 Fix 3MF import crash for silent-mode machine limits with legacy vector sizes (#12289)
Normalize printer_options_with_variant_2 (stride=2) machine limit vectors during preset merge to handle legacy 3MF/projects that store only a single (normal,silent) pair despite multiple printer variants, preventing set_with_restore() size-mismatch crashes.

Crash error message during 3MF import as project:

<img width="833" height="274" alt="image" src="https://github.com/user-attachments/assets/f92148a9-98c6-47b7-a0ab-d5ac8b1f2be4" />

3MF attached that causes the bug. 
[cube.3mf.zip](https://github.com/user-attachments/files/25318309/cube.3mf.zip)
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