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/bracket_stiffness_optimization_V3/2_results/optimization_summary.json

@@ -0,0 +1,46 @@
+{
+  "study_name": "bracket_stiffness_optimization_V3",
+  "optimizer": "Protocol 10 - Intelligent Multi-Strategy",
+  "n_trials": 100,
+  "completed_trials": 96,
+  "feasible_trials": 96,
+  "infeasible_trials": 0,
+  "pruned_trials": 4,
+  "failed_trials": 0,
+  "elapsed_seconds": 850.818676,
+  "pareto_front_all": 48,
+  "pareto_front_feasible": 48,
+  "best_solution": {
+    "best_params": {
+      "support_angle": 69.40980974653294,
+      "tip_thickness": 46.19501757047888
+    },
+    "best_value": [
+      -18609.40367581461,
+      0.13715377147567903
+    ],
+    "best_trial": 9,
+    "is_multi_objective": true,
+    "pareto_front_size": 48,
+    "total_trials": 100,
+    "final_strategy": "tpe",
+    "landscape_analysis": null,
+    "strategy_recommendation": {
+      "confidence": 0.95,
+      "reasoning": "Multi-objective: TPE with multivariate support for Pareto front exploration (36 trials)",
+      "sampler_config": {
+        "type": "TPESampler",
+        "params": {
+          "multivariate": true,
+          "n_startup_trials": 8,
+          "n_ei_candidates": 24,
+          "constant_liar": true
+        }
+      }
+    },
+    "transition_history": [],
+    "strategy_performance": {},
+    "protocol_used": "Protocol 10: Intelligent Multi-Strategy Optimization"
+  },
+  "timestamp": "2025-11-21T19:25:36.880016"
+}