Context

finalize_plan_execution() handles GraphStatus::Canceled (added in #1603) but does not update orchestration metrics (m.orchestration.tasks_completed). The GraphStatus::Completed arm increments this counter correctly, but the Canceled arm does not count tasks that were completed before cancellation.

Impact

Low — metrics will under-report completed tasks when a plan is canceled mid-execution. Relevant for: TUI metrics panel, cost tracking, observability.

Acceptance criteria

In the GraphStatus::Canceled arm of finalize_plan_execution():

• Count tasks with TaskStatus::Completed
• Call self.update_metrics(|m| m.orchestration.tasks_completed += completed_count)

Labels

enhancement, observability