Setra-114: Sotra detail model changes: Make product_specification field optional

setra_client/models.py

@@ -234,7 +234,7 @@ class Detail(BaseModel):
     anlegg: Optional[str]
     aktivitet: Optional[str]
     line_no: int
-    product_specification: int
+    product_specification: Optional[int]
     price: Optional[float]
     quantity: Optional[float]
 

tests/fixtures/detail_list_fixture.json

@@ -33,7 +33,7 @@
     "anlegg": "anlegg",
     "aktivitet": "aktivitet",
     "line_no": 1,
-    "product_specification": 213,
+    "product_specification": null,
     "price": "1234.00",
     "quantity": 2.0
   }

tests/fixtures/order_with_detail_fixture.json

@@ -32,7 +32,7 @@
             "anlegg": "anlegg",
             "aktivitet": "aktivitet",
             "line_no": 1,
-            "product_specification": 213,
+            "product_specification": null,
             "price": 1234.0,
             "quantity": 2.0
         },