fix: 从后端恢复 Runner claim

internal/runnerfacade/registry.go

@@ -90,3 +90,21 @@ func (r *Registry) Remove(assignmentID string) {
 	defer r.mu.Unlock()
 	delete(r.claims, assignmentID)
 }
+
+// RecoverClaimed restores authorization for an executor that already claimed
+// its task before the controller restarted.
+func (r *Registry) RecoverClaimed(assignment taskassignment.Assignment) error {
+	ready, err := r.Offer(assignment)
+	if err != nil {
+		return err
+	}
+	r.mu.Lock()
+	entry := r.claims[assignment.ID]
+	if !entry.claimed {
+		entry.claimed = true
+		close(entry.ready)
+	}
+	r.mu.Unlock()
+	<-ready
+	return nil
+}