Goal

• As an engineer working on RHEL boot time performance, I need detailed insight into granular timing metrics available in a machine-readable format. I need the ability during CI build and test automation to collect and analyze the granular data from `systemd-analyze plot`, which can then be processed into pass/fail criteria for releases.

Acceptance Criteria

• The `systemd-analyze plot --json=pretty --no-legend` command is available in RHEL9 and outputs JSON-formatted timing metrics for systemd components.

This feature was added to upstream systemd with release 253 via PR 25790. It looks as though this is a clean backport to the 252 release used in RHEL9 with no new dependencies.