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>

examples/Models/Bracket/test_csv_field.csv

@@ -0,0 +1,22 @@
+step(),node_id(),x(mm)
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+0, 4, -0.194141328334808
+0, 11, -0.186878338456154
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+0, 8, -0.194141730666161
+0, 122, -0.186893939971924
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+0, 124, -0.187513649463654
+0, 125, -0.190405949950218
+0, 126, -0.188516646623611
+0, 129, -0.186852499842644
+0, 58, -0.194315358996391
+0, 153, -0.186894223093987
+0, 154, -0.187040895223618
+0, 155, -0.190406322479248
+0, 156, -0.187514021992683
+0, 157, -0.188517063856125