db를 maridaDB 사용하도록 수정

ai-server/backend/repository/db_init.py

@@ -1,11 +1,15 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import DeclarativeBase, sessionmaker
-from pathlib import Path
+from backend.config.settings import settings
 
-Path("db").mkdir(parents=True, exist_ok=True)
-
-engine = create_engine('sqlite:///db/roguelike.db', echo=True)
+# MariaDB Connection URL
+DATABASE_URL = f"mysql+pymysql://{settings.db_user}:{settings.db_password}@{settings.db_host}:{settings.db_port}/{settings.db_name}?charset=utf8mb4"
 
+engine = create_engine(
+    DATABASE_URL,
+    echo=True,
+    pool_pre_ping=True
+)
 
 # 세션 팩토리 생성
 SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)