feat: Add AtomizerField training data export and intelligent model discovery

Major additions:
- Training data export system for AtomizerField neural network training
- Bracket stiffness optimization study with 50+ training samples
- Intelligent NX model discovery (auto-detect solutions, expressions, mesh)
- Result extractors module for displacement, stress, frequency, mass
- User-generated NX journals for advanced workflows
- Archive structure for legacy scripts and test outputs
- Protocol documentation and dashboard launcher

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

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

archive/temp_outputs/validated_nn_optimization_results.json

@@ -0,0 +1,19 @@
+{
+  "stats": {
+    "total_time": 3.4194347858428955,
+    "avg_trial_time_ms": 0.25935888290405273,
+    "trials_per_second": 584.8919851550838,
+    "extrapolation_count": 1757,
+    "extrapolation_pct": 87.85
+  },
+  "pareto_summary": {
+    "total": 407,
+    "confident": 0,
+    "needs_fea": 407
+  },
+  "top_designs": [
+    {
+      "mass": 717.7724576426426,
+      "frequency": 15.794277791999079,
+      "uncertainty": 0.3945587883026621,
+      "needs_fea":