Adjust changepoint_range for redis_primary_cpu
Adjust changepoint_range for redis_primary_cpu
This allows us to detect recent changes in trend more quickly. We still exclude 2% of history, so that recent outliers don't influence the trend line too heavily (no empirical evidence, just a thought).
Relates to https://gitlab.com/gitlab-com/gl-infra/tamland/-/merge_requests/598 which is a pre-requisite