refactor: Engine updates and NX hooks improvements

optimization_engine:
- Updated nx_solver.py with improvements
- Enhanced solve_simulation.py
- Updated extractors/__init__.py
- Improved NX CAD hooks (expression_manager, feature_manager,
  geometry_query, model_introspection, part_manager)
- Enhanced NX CAE solver_manager hook

Documentation:
- Updated OP_01_CREATE_STUDY.md protocol
- Updated SYS_12_EXTRACTOR_LIBRARY.md

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

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

optimization_engine/nx_solver.py

@@ -107,18 +107,25 @@ class NXSolver:
 
     def _find_journal_runner(self) -> Path:
         """Find the NX journal runner executable."""
-        # Simcenter3D has run_journal.exe for batch execution
+        # First check the provided nx_install_dir
+        if self.nx_install_dir:
+            direct_path = self.nx_install_dir / "NXBIN" / "run_journal.exe"
+            if direct_path.exists():
+                return direct_path
+
+        # Fallback: check common installation paths
         possible_exes = [
             Path(f"C:/Program Files/Siemens/Simcenter3D_{self.nastran_version}/NXBIN/run_journal.exe"),
             Path(f"C:/Program Files/Siemens/NX{self.nastran_version}/NXBIN/run_journal.exe"),
+            Path(f"C:/Program Files/Siemens/DesigncenterNX{self.nastran_version}/NXBIN/run_journal.exe"),
         ]
 
         for exe in possible_exes:
             if exe.exists():
                 return exe
 
-        # Return first guess (will error in __init__ if doesn't exist)
-        return possible_exes[0]
+        # Return the direct path (will error in __init__ if doesn't exist)
+        return self.nx_install_dir / "NXBIN" / "run_journal.exe" if self.nx_install_dir else possible_exes[0]
 
     def _find_solver_executable(self) -> Path:
         """Find the Nastran solver executable."""
@@ -440,9 +447,35 @@ sys.argv = ['', {argv_str}]  # Set argv for the main function
         # Set up environment for Simcenter/NX
         env = os.environ.copy()
 
-        # Use existing SPLM_LICENSE_SERVER from environment if set
-        # Only set if not already defined (respects user's license configuration)
-        if 'SPLM_LICENSE_SERVER' not in env or not env['SPLM_LICENSE_SERVER']:
+        # Get SPLM_LICENSE_SERVER - prefer system registry (most up-to-date) over process env
+        license_server = ''
+
+        # First try system-level environment (Windows registry) - this is the authoritative source
+        import subprocess as sp
+        try:
+            result = sp.run(
+                ['reg', 'query', 'HKLM\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment', '/v', 'SPLM_LICENSE_SERVER'],
+                capture_output=True, text=True, timeout=5
+            )
+            if result.returncode == 0:
+                # Parse: "    SPLM_LICENSE_SERVER    REG_SZ    value"
+                for line in result.stdout.splitlines():
+                    if 'SPLM_LICENSE_SERVER' in line:
+                        parts = line.split('REG_SZ')
+                        if len(parts) > 1:
+                            license_server = parts[1].strip()
+                            break
+        except Exception:
+            pass
+
+        # Fall back to process environment if registry query failed
+        if not license_server:
+            license_server = env.get('SPLM_LICENSE_SERVER', '')
+
+        if license_server:
+            env['SPLM_LICENSE_SERVER'] = license_server
+            print(f"[NX SOLVER] Using license server: {license_server}")
+        else:
             env['SPLM_LICENSE_SERVER'] = '29000@localhost'
             print(f"[NX SOLVER] WARNING: SPLM_LICENSE_SERVER not set, using default: {env['SPLM_LICENSE_SERVER']}")