"""Declarative base for ORM models.

No model classes are defined in this project yet, by design: the database
schema is introduced deliberately through Alembic migrations rather than being
created implicitly at import time.
"""

from sqlalchemy.orm import DeclarativeBase


class Base(DeclarativeBase):
    """Common base class for every ORM model.

    Subclass this to declare a model. New models must also be imported by
    ``app.models`` so that ``alembic revision --autogenerate`` can see them.
    """