feat: Add NX study models and optimization histories

Includes all study folders with NX models for development:
- bracket_stiffness_optimization (V1, V2, V3)
- drone_gimbal_arm_optimization
- simple_beam_optimization
- uav_arm_optimization (V1, V2)
- training_data_export_test
- uav_arm_atomizerfield_test

Contains .prt, .fem, .sim files and optimization databases.

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

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

studies/uav_arm_atomizerfield_test/reset_study.py

@@ -0,0 +1,38 @@
+"""
+Reset the UAV arm AtomizerField test study
+
+Clears all optimization results and logs to start fresh.
+Preserves the setup and model files.
+"""
+
+from pathlib import Path
+import shutil
+
+def reset_study():
+    """Reset study to clean state."""
+
+    study_dir = Path(__file__).parent
+
+    # Remove results directory
+    results_dir = study_dir / "2_results"
+    if results_dir.exists():
+        print(f"Removing {results_dir}...")
+        shutil.rmtree(results_dir)
+
+    # Remove training data export directory if exists
+    training_data_dir = Path("atomizer_field_training_data/uav_arm_test")
+    if training_data_dir.exists():
+        print(f"Removing {training_data_dir}...")
+        shutil.rmtree(training_data_dir)
+
+    # Remove any Python cache
+    pycache = study_dir / "__pycache__"
+    if pycache.exists():
+        print(f"Removing {pycache}...")
+        shutil.rmtree(pycache)
+
+    print("Study reset complete!")
+    print("You can now run: python run_optimization.py")
+
+if __name__ == "__main__":
+    reset_study()