anomaly-detection recipe test periodically hangs

[davetroiano]

It sometimes hangs during the step Running step Group events by time intervals. Possibly a timing thing causing this to never have results:

SELECT USERNAME, WINDOW_START, WINDOW_END
FROM ACCOUNTS_TO_MONITOR
EMIT CHANGES
LIMIT 1;

[davetroiano]

root cause identified, opened this survivor for the work to sweep and start fixing