Add barcode to salesordershipment (#9745)

* Add InvenTreeBarcodeMixin to SalesOrderShipment

* Barcode model type code method added for SalesOrderShipment class

* Add barcode data to SalesOrderShipment serializer

* Bump API version

---------

Co-authored-by: meenaraj22 <meena@blaze.ws>
Co-authored-by: Matthias Mair <code@mjmair.com>

src/backend/InvenTree/order/models.py

@@ -1951,6 +1951,7 @@ class SalesOrderShipmentReportContext(report.mixins.BaseReportContext):
 
 class SalesOrderShipment(
     InvenTree.models.InvenTreeAttachmentMixin,
+    InvenTree.models.InvenTreeBarcodeMixin,
     InvenTree.models.InvenTreeNotesMixin,
     report.mixins.InvenTreeReportMixin,
     InvenTree.models.MetadataMixin,
@@ -1970,6 +1971,11 @@ class SalesOrderShipment(
         notes: Custom notes field for this shipment
     """
 
+    @classmethod
+    def barcode_model_type_code(cls):
+        """Return the associated barcode model type code for this model."""
+        return 'SS'
+
     class Meta:
         """Metaclass defines extra model options."""