feat(phase-4a): backend skeleton, auth, health, tests

app/models/org.py

@@ -0,0 +1,34 @@
+"""Organization model."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Optional
+
+from sqlalchemy import String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base, TimestampMixin
+
+if TYPE_CHECKING:
+    from app.models.user import User
+
+
+class Org(Base, TimestampMixin):
+    __tablename__ = "orgs"
+
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    name: Mapped[str] = mapped_column(String(255), nullable=False)
+    logo_url: Mapped[Optional[str]] = mapped_column(String(1024), nullable=True)
+    default_currency: Mapped[str] = mapped_column(
+        String(3), nullable=False, default="EUR", server_default="EUR"
+    )
+
+    # Relationship to users (defined here to resolve circular import)
+    users: Mapped[list["User"]] = relationship(
+        back_populates="org",
+        lazy="selectin",
+        cascade="all, delete-orphan",
+    )
+
+    def __repr__(self) -> str:
+        return f"<Org id={self.id} name={self.name!r}>"