Flaky test: tests/sentry/spans/consumers/process/test_consumer.py::test_schema_validator_rejects_none_fields[start_timestamp]

Failing test: `tests/sentry/spans/consumers/process/test_consumer.py::test_schema_validator_rejects_none_fields[start_timestamp]` Sentry sha: 94d9d60db8e0e6f4937593247f1d6d178df1bcaa Run: https://github.com/getsentry/sentry/actions/runs/22267329565 ``` .venv/lib/python3.13/site-packages/_pytest/runner.py:340: in from_call result: Optional[TResult] = func() .venv/lib/python3.13/site-packages/_pytest/runner.py:240: in <lambda> lambda: runtest_hook(item=item, **kwds), when=when, reraise=reraise .venv/lib/python3.13/site-packages/pluggy/_hooks.py:513: in __call__ return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult) .venv/lib/python3.13/site-packages/pluggy/_manager.py:120: in _hookexec return self._inner_hookexec(hook_name, methods, kwargs, firstresult) .venv/lib/python3.13/site-packages/_pytest/threadexception.py:87: in pytest_runtest_call yield from thread_exception_runtest_hook() .venv/lib/python3.13/site-packages/_pytest/threadexception.py:63: in thread_exception_runtest_hook yield .venv/lib/python3.13/site-packages/_pytest/unraisableexception.py:90: in pytest_runtest_call yield from unraisable_exception_runtest_hook() .venv/lib/python3.13/site-packages/_pytest/unraisableexception.py:80: in unraisable_exception_runtest_hook warnings.warn(pytest.PytestUnraisableExceptionWarning(msg)) E pytest.PytestUnraisableExceptionWarning: Exception ignored in: <Finalize object, dead> E  E Traceback (most recent call last): E File "/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/multiprocessing/resource_tracker.py", line 195, in _send E self.ensure_running() E ~~~~~~~~~~~~~~~~~~~^^ E File "/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/multiprocessing/resource_tracker.py", line 114, in ensure_runnin…