- POST /api/stock/ai-coach: Anthropic API 프록시 (API 키 서버 보관)
- trade/balance, trade/order: ADMIN_API_KEY 헤더 인증 추가
- print() → logging 모듈 전환 (stock-lab)
- .env.example: ADMIN_API_KEY, ANTHROPIC_API_KEY, CORS_ALLOW_ORIGINS 추가
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>