capsys fixture cannot be used with a session-scoped fixture

I have the following use-case: there is a class Auditor, which helps gather statistic about certain tests. This class is used via a fixture:

@pytest.fixture(scope="session")
def auditor():
    aud = Auditor()
    yield aud
    aud.display_summary()

The intention being that some tests would use this fixture, report their results to the Auditor singleton, and in the end of the testing session a report table is produced.

Unfortunately, currently this works only with -s flag, because otherwise all output is captured. Ideally I'd like to write the fixture function as

@pytest.fixture(scope="session")
def auditor(capsys):
    aud = Auditor()
    yield aud
    with capsys.disabled():
        aud.display_summary()

however doing so produces an error that capsys is a function-scope capture and cannot be used with a session-scope fixture.

I believe there should be a way to provide a session-scoped variant of capsys, so that it can be used from user-defined session-scoped fixtures.

Start by reproducing the session-scoped fixture that requests capsys and the resulting scope error. Read the capture-fixture behavior and fixture-scope handling around this case, then determine how a session-scoped capture variant should interact with capsys.disabled(). Done means a session-scoped fixture can emit its final summary without requiring -s.