feat: lifespan에 strategy_cfg.auto_init() 추가

backend/app/main.py

@@ -354,6 +354,14 @@ async def lifespan(app: FastAPI):
         except Exception as e:
             logger.warning(f"⚠️ loss_tracker 초기화 실패 (non-critical): {e}")
 
+        # ── 전략 파라미터 DB 초기화 (config.py 기본값 → strategy_configs 테이블 seed) ──
+        try:
+            from app.services.strategy_config_service import strategy_cfg
+            await strategy_cfg.auto_init()
+        except Exception as e:
+            logger.warning(f"⚠️ strategy_cfg 초기화 실패 (non-critical): {e}")
+        # ────────────────────────────────────────────────────────────────────────────
+
         try:
             from app.models.models import StockAnalysis, TradeHistory, Portfolio
             from sqlalchemy import delete