Make sure ordered_at is evaluated at persist (#3629) (patch)

### Fixed

- Ordered_at is updated for each submitted order

cg/store/models.py

@@ -967,7 +967,7 @@ class Order(Base):
     cases: Mapped[list[Case]] = orm.relationship(secondary=order_case, back_populates="orders")
     customer_id: Mapped[int] = mapped_column(ForeignKey("customer.id"))
     customer: Mapped[Customer] = orm.relationship(foreign_keys=[customer_id])
-    order_date: Mapped[datetime] = mapped_column(default=datetime.now())
+    order_date: Mapped[datetime] = mapped_column(default=datetime.now)
     ticket_id: Mapped[int] = mapped_column(unique=True, index=True)
     workflow: Mapped[str] = mapped_column(types.Enum(*(workflow.value for workflow in Workflow)))
     is_delivered: Mapped[bool] = mapped_column(default=False)