[Security Solution][Detections] Handle dupes when processing threshold rules #81798
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Superseded by #83062
Summary
This PR makes changes to processing of threshold rules in order to prevent duplicates when evaluating thresholds over long lookback intervals. To do so, we make a best effort guess to reproduce the query from the last rule run, and ensure that any new matches still remain above the threshold, even when these previous matches are discarded.
TODO more to come...
Checklist
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For maintainers