pub const ASSIGNEE_ASSIGNED: &str = "core.assignee_assigned";Expand description
One of the Run’s Operator seats gained a holder (a launch pin, a
launch-time auto-seat, or POST /v1/runs/:id/acquire). Payload:
{"slot", "assignee": {op, desc, gen}, "source", "previous": {…}|null}.
Step-less, like CANCEL_REQUESTED: who holds a seat is a fact
about the Run, not about one step — but it rides the SAME rail the
step events do, deliberately, so a reader reconstructing “what
happened here” never has to line two streams up against each other.