Use @override decorator in Python code

[williamckha]

Description of the task

Python 3.12 adds an @override decorator that we should use.

We can borrow the javadoc convention where methods marked with @override do not require docstrings (unless the overriding method has some more specific behaviour that needs to be documented).

Acceptance criteria

• Mark all methods that override a method or implement an abstract method with @override

Blocked By