fix(GODT-2442): Handle event poll not starting after resync

It is possible, on slower machines, that the new event poll task is not
yet registered and attempts to cancel have nothing to cancel.

In this case, we need the refresh event to cancel the task, at that
point it is guaranteed that the task exists.

internal/events/user.go

@@ -148,7 +148,8 @@ func (event UserChanged) String() string {
 type UserRefreshed struct {
 	eventBase
 
-	UserID string
+	UserID          string
+	CancelEventPool bool
 }
 
 func (event UserRefreshed) String() string {