feat: makes price models consistent

schemas/prices/StandardPrice.yaml

@@ -3,5 +3,9 @@ required: [type, priceMinor]
 properties:
   type:
     $ref: './PriceType.yaml'
-  priceMinor:
-    $ref: '../types/MinorAmount.yaml'
+  rules:
+    type: object
+    required: [priceMinor]
+    properties:
+      priceMinor:
+        $ref: '../types/MinorAmount.yaml'

schemas/prices/VatModelShort.yaml

@@ -1,9 +1,9 @@
 type: object
-required: [id, createdAt]
+required: [id, createdAt, validFrom]
 properties:
   id:
     $ref: '../types/IDwritable.yaml'
-  validFrom:
-    $ref: '../types/ValidFrom.yaml'
   createdAt:
-    $ref: '../types/CreatedAt.yaml'
+    $ref: '../types/CreatedAt.yaml'
+  validFrom:
+    $ref: '../types/ValidFrom.yaml'

schemas/products/CancellationPolicyShort.yaml

@@ -3,7 +3,7 @@ required: [id, createdAt]
 properties:
   id:
     $ref: '../types/IDwritable.yaml'
+  createdAt:
+    $ref: '../types/CreatedAt.yaml'
   validFrom:
     $ref: '../types/ValidFrom.yaml'
-  createdAt:
-    $ref: '../types/CreatedAt.yaml'