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1322d42549
Previously, the scaler was scaling up and down independently. Because when scaling up/down, Kafka rebalances the topic, temporarily, we get scale down requests and the rate limiter won't stop them as it is independant from the scale up rate limiter. Instead, the rate limit for increase acts as a gracetime where everything is ignored, then between that and the rate limit for decrease, we only consider increasing the number of workers, past that, we scaling down as long as we have a majority of scale down requests (compared to steady ones). Fix #2080 (hopefully)