Fix NX version: DesigncenterNX2512 (was looking for NX2412)

- Add DesigncenterNX{version} to install path search
- Update default version to 2512
- Root cause of 'Part file is from a newer version' error

projects/hydrotech-beam/models/_temp_solve_journal.py

@@ -1,6 +1,6 @@
 # Auto-generated journal for solving Beam_sim1.sim
 import sys
-sys.argv = ['', r'C:\Users\antoi\Atomizer\projects\hydrotech-beam\studies\01_doe_landscape\..\..\models\Beam_sim1.sim', None, 'beam_half_core_thickness=25.162', 'beam_face_thickness=21.504', 'holes_diameter=300.0', 'hole_count=10.0']  # Set argv for the main function
+sys.argv = ['', r'C:\Users\antoi\Atomizer\projects\hydrotech-beam\models\Beam_sim1.sim', None, 'beam_half_core_thickness=25.162', 'beam_face_thickness=21.504', 'holes_diameter=300.0', 'hole_count=10.0']  # Set argv for the main function
 """
 NX Journal Script to Solve Simulation in Batch Mode
 

projects/hydrotech-beam/studies/01_doe_landscape/nx_interface.py

@@ -145,7 +145,7 @@ class AtomizerNXSolver:
     def __init__(
         self,
         model_dir: str | Path = ".",
-        nx_version: str = "2412",
+        nx_version: str = "2512",
         timeout: int = 600,
         use_iteration_folders: bool = False,  # Disabled: copied NX files break internal references
     ):