Enable 'units' field for plugin settings (#9856)

* Enable 'units' field for plugin settings

* Bump API version

src/backend/InvenTree/InvenTree/api_version.py

@@ -1,11 +1,15 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 356
+INVENTREE_API_VERSION = 357
 
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 INVENTREE_API_TEXT = """
+
+v357 -> 2025-06-25 : https://github.com/inventree/InvenTree/pull/9856
+    - Adds "units" field to PluginSetting API endpoints
+
 v356 -> 2025-06-20 : https://github.com/inventree/InvenTree/pull/9817
     - Enable generation of reports against the Company model type
 

src/backend/InvenTree/common/serializers.py

@@ -213,6 +213,7 @@ class GenericReferencedSettingSerializer(SettingsSerializer):
                 'model_filters',
                 'api_url',
                 'typ',
+                'units',
                 'required',
             ]
 

src/backend/InvenTree/plugin/samples/integration/sample.py

@@ -64,6 +64,7 @@ class SampleIntegrationPlugin(
             'description': _('A numerical setting'),
             'validator': int,
             'default': 123,
+            'units': 'metres',
         },
         'CHOICE_SETTING': {
             'name': _('Choice Setting'),