<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=249133) </details> <!--IssueSummary end--> As discussed in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/41881#note_411935733, we have existing ~"group::source code" metrics in `known_events.yml`. They are the following: - `wiki_action` - `design_action` - `project_action` - `merge_request_action` Naming convention has been applied to usage pings using Redis HLL counters: https://docs.gitlab.com/ee/development/telemetry/usage_ping.html#adding-new-events. This issue is for updating those metrics to use appropriate prefixes. Also, look into possibility of adding it to the `source_code` `redis_slot` added in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/41881. /cc @alinamihaila @marc_shaw