run black, add isort config to pyproject.toml

letta/orm/base.py

@@ -2,13 +2,7 @@ from datetime import datetime
 from typing import Optional
 
 from sqlalchemy import Boolean, DateTime, String, func, text
-from sqlalchemy.orm import (
-  DeclarativeBase,
-  Mapped,
-  declarative_mixin,
-  declared_attr,
-  mapped_column,
-)
+from sqlalchemy.orm import DeclarativeBase, Mapped, declarative_mixin, declared_attr, mapped_column
 
 
 class Base(DeclarativeBase):