fix(todo-cleanup): keep --archive-done silent on a real-mode no-op

The wrap runs --archive-done twice (wrap-it-up, then open-tasks.org Phase A). The first pass archives and reports. The second finds nothing and used to print "0 subtree(s) moved", which reads as alarming next to the first pass's diff. Now a real-mode run that moves nothing and skips nothing says nothing. Check mode still previews "0 would move", and a missing-section skip still reports, since those are conditions the caller needs.

0 files changed, 0 insertions, 0 deletions