feat: refactor db calls to url service

app/db/database.py

@@ -1,7 +1,8 @@
-from app.config import settings
 from databases import Database
 from sqlalchemy import create_engine, MetaData
-from sqlalchemy.orm import declarative_base, sessionmaker
+from sqlalchemy.orm import declarative_base
+
+from app.config import settings
 
 # for Alembic migrations and sync operations
 engine = create_engine(settings.database_url)