feat: mv *.db to data

backend/app/database.py

@@ -3,10 +3,10 @@ from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
 
-# Use absolute path to ensure dataclaw.db is created in the backend root directory, 
-# preventing nested backend/backend/dataclaw.db issues when starting from different cwd.
-BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-DB_PATH = os.path.join(BASE_DIR, "dataclaw.db")
+from app.core.data_root import get_data_root
+
+# Ensure dataclaw.db is created in the global data directory
+DB_PATH = get_data_root() / "dataclaw.db"
 SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_PATH}"
 
 engine = create_engine(