The Events tab of a staff person's profile — a read-only, paginated feed
of the activity logged for this person (PhoenixKit.Activity entries scoped
to resource_type: "staff_person" + the person's uuid). Staff already logs
~all person mutations (create/update/trash/restore, employment, skills, file/
image add+remove), so this is the person's audit timeline.
Read-only by design: no live PubSub prepend (a fresh load on tab open / page
change is enough for an audit log, and avoids the page-vs-prepend hazard).
Labels/icons come from PhoenixKitStaff.ActivityLabels; badge colour reuses
core PhoenixKit.Activity.action_badge_color/1.