[IMP] website_sale_aplicoop: Fix mandatory translation linting errors

- Added self.env._() translation to ValidationError in _check_company_groups
- Added self.env._() translation to ValidationError in _check_dates
- Replaced f-strings with .format() for proper lazy translation

website_sale_aplicoop/models/group_order.py

@@ -269,8 +269,14 @@ class GroupOrder(models.Model):
             for group in record.group_ids:
                 if group.company_id and group.company_id != record.company_id:
                     raise ValidationError(
-                        f"Group {group.name} belongs to company "
-                        f"{group.company_id.name}, not to {record.company_id.name}."
+                        self.env._(
+                            "Group {group} belongs to company {group_company}, "
+                            "not to {record_company}."
+                        ).format(
+                            group=group.name,
+                            group_company=group.company_id.name,
+                            record_company=record.company_id.name,
+                        )
                     )
 
     @api.constrains("start_date", "end_date")
@@ -278,7 +284,9 @@ class GroupOrder(models.Model):
         for record in self:
             if record.start_date and record.end_date:
                 if record.start_date > record.end_date:
-                    raise ValidationError("Start date cannot be greater than end date")
+                    raise ValidationError(
+                        self.env._("Start date cannot be greater than end date")
+                    )
 
     def action_open(self):
         """Open order for purchases."""