feat: Update create-study skill with Phase 1.3 logging and create UAV arm test study

Phase 1.3.1 Complete - Logging Integration:

1. Updated .claude/skills/create-study.md:
   - Added IMPORTANT section on structured logging from Phase 1.3
   - Documents logger import and initialization
   - Lists all structured logging methods (trial_start, trial_complete, etc.)
   - References drone_gimbal_arm as template

2. Created studies/uav_arm_optimization/:
   - Multi-objective NSGA-II study (50 trials)
   - Same type as drone_gimbal_arm but renamed for UAV context
   - Full integration with Phase 1.3 logging system
   - Configuration: minimize mass + maximize frequency
   - Running to validate complete logging system

Benefits:
- All future studies created via skill will have consistent logging
- Production-ready error handling and file logging from day 1
- Color-coded console output for better monitoring
- Automatic log rotation (50MB, 3 backups)

Related: Phase 1.2 (Configuration), Phase 1.3 (Logger), Phase 1.3.1 (Integration)

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

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

.claude/skills/create-study.md

@@ -237,6 +237,18 @@ Generate a complete Python script based on protocol:
   - Storage location
 - Results display and dashboard instructions
 
+**IMPORTANT**: Always include structured logging from Phase 1.3:
+- Import: `from optimization_engine.logger import get_logger`
+- Initialize in main(): `logger = get_logger("{study_name}", study_dir=results_dir)`
+- Replace all print() with logger.info/warning/error
+- Use structured methods:
+  - `logger.study_start(study_name, n_trials, sampler)`
+  - `logger.trial_start(trial.number, design_vars)`
+  - `logger.trial_complete(trial.number, objectives, constraints, feasible)`
+  - `logger.trial_failed(trial.number, error)`
+  - `logger.study_complete(study_name, n_trials, n_successful)`
+- Error handling: `logger.error("message", exc_info=True)` for tracebacks
+
 **Template**: Use [studies/drone_gimbal_arm_optimization/run_optimization.py](../studies/drone_gimbal_arm_optimization/run_optimization.py:1) as reference
 
 ### 4. reset_study.py