Update app/database.py

app/database.py

@@ -2,7 +2,7 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker, declarative_base
 from app.config import settings
 
-# Detect SQLite for fast local/Spaces boot without env vars
+# SQLiteかどうか検知
 is_sqlite = settings.DATABASE_URL.startswith("sqlite+")
 
 engine = create_engine(