feat: Pre-migration checkpoint - updated docs and utilities

Updates before optimization_engine migration:
- Updated migration plan to v2.1 with complete file inventory
- Added OP_07 disk optimization protocol
- Added SYS_16 self-aware turbo protocol
- Added study archiver and cleanup utilities
- Added ensemble surrogate module
- Updated NX solver and session manager
- Updated zernike HTML generator
- Added context engineering plan
- LAC session insights updates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

optimization_engine/utils/nx_session_manager.py

@@ -24,6 +24,7 @@ SESSION_LOCK_DIR = Path(os.environ.get('TEMP', '/tmp')) / 'atomizer_nx_sessions'
 
 # Default NX installation paths (in order of preference)
 DEFAULT_NX_PATHS = [
+    Path(r"C:\Program Files\Siemens\DesigncenterNX2512\NXBIN\ugraf.exe"),  # DesignCenter (preferred)
     Path(r"C:\Program Files\Siemens\NX2506\NXBIN\ugraf.exe"),
     Path(r"C:\Program Files\Siemens\NX2412\NXBIN\ugraf.exe"),
     Path(r"C:\Program Files\Siemens\Simcenter3D_2506\NXBIN\ugraf.exe"),