[HocVoNgThai]

Spying on an instance method decorated with functools.lru_cache or functools.cache through its class replaces its binding descriptor with a mock that does not supply self. Calls through an instance then raise TypeError.

For example, if Worker.calculate(self, value) is cached and returns value * 2, worker.calculate(3) works until mocker.spy(Worker, "calculate") is installed. This change keeps the result 6, records (worker, 3), and preserves cache hits.

Use the spy's function wrapper as the autospec for callable class descriptors so instance binding is preserved. Add regressions for both cache decorators, multiple instances, cache hits, reset/stop, and cached static/class methods.

Closes #657