Previous attempt wrote to sys.__stderr__ from the test fixture. Under
xdist, fixtures run inside worker subprocesses whose stderr is captured
by the controller and only released to the live log on test failure —
so passing tests' verdicts were silently swallowed.
Round-trip via report.user_properties: the worker-side fixture stashes
the verdict on user_properties, xdist serializes it onto the report,
and a controller-side pytest_runtest_logreport hook writes it via the
TerminalReporter (the same plugin that emits PASSED/FAILED markers).
TerminalReporter is resolved lazily on first hook call because it's
not yet registered when conftest's pytest_configure runs.
Verified locally in both serial and xdist modes.
mateo-berri
53f71fbf4d