standalone: device: wrap command result in object

Author: rnovatorov

src/enapter/standalone/device.py

@@ -56,5 +56,4 @@ async def execute_command(self, name: str, args: CommandArgs) -> CommandResult:
             command = getattr(self, self._command_prefix + name)
         except AttributeError:
             raise NotImplementedError() from None
-        result = await command(**args)
-        return result if result is not None else {}
+        return {"result": await command(**args)}