feat: deal status history and default created_at in db

models/deal.py

@@ -7,7 +7,7 @@ from models.base import BaseModel
 from models.mixins import SoftDeleteMixin, CreatedAtMixin, IdMixin
 
 if TYPE_CHECKING:
-    from models import Status, Board
+    from models import Status, Board, CardStatusHistory
 
 
 class Deal(BaseModel, IdMixin, SoftDeleteMixin, CreatedAtMixin):
@@ -27,3 +27,9 @@ class Deal(BaseModel, IdMixin, SoftDeleteMixin, CreatedAtMixin):
         ForeignKey("boards.id"), nullable=True, server_default="1"
     )
     board: Mapped["Board"] = relationship(back_populates="deals")
+
+    status_history: Mapped[list["CardStatusHistory"]] = relationship(
+        back_populates="deal",
+        cascade="all, delete-orphan",
+        lazy="noload",
+    )