feat: pallets and boxes for deals

models/deal.py

@@ -7,6 +7,7 @@ from sqlalchemy.orm import relationship, backref, Mapped, mapped_column
 
 from models.base import BaseModel
 from .marketplace import BaseMarketplace
+from .shipping import Pallet, Box
 from .shipping_warehouse import ShippingWarehouse
 
 if TYPE_CHECKING:
@@ -104,6 +105,9 @@ class Deal(BaseModel):
     manager_id: Mapped[int] = mapped_column(ForeignKey('users.id'), nullable=True)
     manager: Mapped[Optional["User"]] = relationship(back_populates='managed_deals', lazy='joined')
 
+    pallets: Mapped[list[Pallet]] = relationship(back_populates='deal', lazy='selectin')
+    boxes: Mapped[list[Box]] = relationship(back_populates='deal', lazy='selectin')
+
 
 class DealStatusHistory(BaseModel):
     __tablename__ = 'deals_status_history'