Test pollution: tests/sentry/testutils/thread_leaks/test_pytest.py::TestSentryCapture::test_capture_event_strict_no_allowlist

detected test pollution: `pytest tests/sentry/spans/consumers/process/test_consumer.py::test_schema_validator_rejects_none_fields[trace_id] tests/sentry/testutils/thread_leaks/test_pytest.py::TestSentryCapture::test_capture_event_strict_no_allowlist`
sentry sha: 7ff1be947968f2335a896cb228819f332e9b2035
job: https://github.com/getsentry/sentry/actions/runs/22292739398/job/64483033140

Start by reproducing the reported command from the issue, using the referenced Sentry SHA and CI job for context. Compare the two tests when run together versus independently, then trace the reported pollution; done means the test pair no longer causes pollution and both tests pass.

Written by the indexing model from the issue text.