Add a /command to run only perf tests

Editor assessment

The ci type correctly signals a pipeline-only change. The subject 'Add a /command to run only perf tests' is imperative and specific, though the capital 'A' is a minor style deviation from the all-lowercase convention. The blank line before the body is correct, and the Co-authored-by trailer is a properly formatted footer. However, the body reads like a pasted list of PR review commits — 'Add new line at the end of the file' adds no value and buries the meaningful notes about running artifacts on failure and removing the perf comment. A reader of git log gets the what but not the why. A scope such as 'perf' or the workflow name would help, and a single consolidated paragraph explaining the motivation would serve changelog and release notes far better.