Show seconds in admin trace timestamps via a dedicated, overridable date format

The process instance trace (Administration » Structure » Process instances » an instance) renders the Arrived and Updated columns with the named short date format, so they show minute precision only (for example 10 Jul 2026 - 17:35). When several trace steps happen within the same minute, their order and the elapsed time between nodes are invisible. The workflow version list Created column has the same limitation.

Proposed resolution

Ship a dedicated, unlocked orchestra_datetime date format (default pattern Y-m-d H:i:s) and use it for those admin timestamps. Because it is a named, unlocked format, an admin can change the pattern at Configuration » Regional » Date and time formats, and a multilingual site can localize it per language, so a site that prefers a US-style display is not stuck with the ISO default.

Changes

• New core.date_format.orchestra_datetime config in orchestra_ui/config/install.
• The trace Arrived/Updated cells (OrchestraUiController) and the version list Created cell (WorkflowVersionController) use the new format instead of short.

Customer-facing token timestamps keep the friendlier medium format. No update hook is added: Orchestra is pre-release, so the format installs with the module.