quick fix

schemas/deal.py

@@ -35,7 +35,7 @@ class DealSummary(BaseSchema):
     client_name: str
     changed_at: datetime.datetime
     created_at: datetime.datetime
-    deadline: datetime.datetime
+    deadline: Optional[datetime.datetime] = None
     status: int
     total_price: int
     rank: int
@@ -58,6 +58,7 @@ class DealServiceSchema(BaseSchema):
     employees: List[UserSchema]
     is_fixed_price: bool
 
+
 class DealProductServiceSchema(BaseSchema):
     service: ServiceSchema
     price: int