Expose the stream version of a module in the API

module_build_service/models.py

@@ -814,6 +814,7 @@ class ModuleBuild(MBSBase):
                 } for record in self.state_trace(self.id)
             ],
             'state_url': state_url,
+            'stream_version': self.stream_version,
             'virtual_streams': [virtual_stream.name for virtual_stream in self.virtual_streams],
         })
 

tests/test_views/test_views.py

@@ -205,6 +205,7 @@ class TestViews:
         assert data['state_trace'] == []
         assert data['state_url'] == '/module-build-service/1/module-builds/2'
         assert data['stream'] == '1'
+        assert data['stream_version'] is None
         assert data['tasks'] == {
             'rpms': {
                 'module-build-macros': {