Format Python code and add Ruff tooling

models.py

@@ -1,8 +1,10 @@
-from database import Base
 from sqlalchemy import Boolean, String
 from sqlalchemy.dialects.mysql import BIGINT
 from sqlalchemy.orm import Mapped, mapped_column
 
+from database import Base
+
+
 class Todo(Base):
     __tablename__ = "todos"
     id: Mapped[int] = mapped_column(