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/nx_solver.py

@@ -242,19 +242,28 @@ class NXSolver:
         Format: [unit]name=value
         Example: [mm]whiffle_min=42.5
         """
-        # Default unit mapping (could be extended or made configurable)
+        # Default unit mapping - MUST match NX model expression units exactly
+        # Verified against working turbo V1 runs
         UNIT_MAPPING = {
             # Length parameters (mm)
             'whiffle_min': 'mm',
             'whiffle_triangle_closeness': 'mm',
             'inner_circular_rib_dia': 'mm',
             'outer_circular_rib_offset_from_outer': 'mm',
+            'Pocket_Radius': 'mm',
+            'center_thickness': 'mm',
+            # Lateral pivot/closeness - mm in NX model (verified from V1)
             'lateral_outer_pivot': 'mm',
             'lateral_inner_pivot': 'mm',
             'lateral_middle_pivot': 'mm',
             'lateral_closeness': 'mm',
-            # Angle parameters (degrees)
-            'whiffle_outer_to_vertical': 'Degrees',
+            # Rib/face thickness parameters (mm)
+            'rib_thickness': 'mm',
+            'ribs_circular_thk': 'mm',
+            'rib_thickness_lateral_truss': 'mm',
+            'mirror_face_thickness': 'mm',
+            # Angle parameters (Degrees) - verified from working V1 runs
+            'whiffle_outer_to_vertical': 'Degrees',  # NX expects Degrees (verified V1)
             'lateral_inner_angle': 'Degrees',
             'lateral_outer_angle': 'Degrees',
             'blank_backface_angle': 'Degrees',