Add tenant model

src/app/db/models/tenant.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from advanced_alchemy.base import SlugKey, UUIDAuditBase
+from sqlalchemy import String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+if TYPE_CHECKING:
+    from .user import User
+
+
+class Tenant(UUIDAuditBase, SlugKey):
+    """A group of tenants i.e. a company or an organization."""
+
+    __tablename__ = "tenant"
+    __pii_columns__ = {"name", "description", "url"}
+    name: Mapped[str] = mapped_column(nullable=False, index=True)
+    description: Mapped[str | None] = mapped_column(String(length=500), nullable=True, default=None)
+    url: Mapped[str | None] = mapped_column(nullable=True, default=None)
+    is_active: Mapped[bool] = mapped_column(default=True, nullable=False)
+    # -----------
+    # ORM Relationships
+    # ------------
+    users: Mapped[list[User]] = relationship(
+        back_populates="tenant",
+        innerjoin=True,
+        lazy="selectin",
+    )