[Feature][DORA Metrics][Median Lead time for changes] Filter PRs based on tags

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Use case

Hi everyone, I've set up DevLake for an example project and realized that the median lead time for changes is very low. I've check the documentation about the calcualtion of the metrik (https://devlake.apache.org/docs/v0.21/Metrics/LeadTimeForChanges#how-is-it-calculated). Since you're taking the mean of all PRs in the time range the metric also picks up Renovatebot PRs in my case. Therefore, it looks like my team's overperforming though it's just the auto-merged Renovate PRs. Therefore, it would be great if there was a way to filter those PRs (maybe based on Tag or RegEx).

Description

Please add a new transformation to the GitLab Scope config that let's one filter PRs based on tag or Regex so that those are excluded from the metrics.

Related issues

No response

Are you willing to submit a PR?

• [ ] Yes I am willing to submit a PR!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

Hi everyone, just a quick heads up. My current workaround was to edit the Grafana graphics for "Media lead time to changes" and add the condition and head_ref NOT LIKE 'renovate/%'. This works for now but I fear that in the future I'll have to do it every time the dashboards change. Cheers

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