A size band describes one episode (DESIGN.md §5.5), so both the target
penalty and the floor now compare a release's size divided by the number
of episodes it covers. The caller supplies the count — arr-core has no
IO. Movies and unknown counts divide by one, so movie scoring is
unchanged and pinned by test.
Closes#180
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Miguel Palhas