Initial Claude implementation

app/models/role.py

@@ -0,0 +1,23 @@
+from sqlalchemy import String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.core.database import Base
+from app.models.associations import role_permissions, user_roles
+
+
+class Role(Base):
+    __tablename__ = "roles"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    description: Mapped[str | None] = mapped_column(String(255), default=None)
+
+    users: Mapped[list["User"]] = relationship(  # noqa: F821
+        secondary=user_roles,
+        back_populates="roles",
+    )
+    permissions: Mapped[list["Permission"]] = relationship(  # noqa: F821
+        secondary=role_permissions,
+        back_populates="roles",
+        lazy="selectin",
+    )