v0.2.1 — auto-open output folder after run + deliver — friend was lost without it

Third friend-feedback patch. He ran dj-edit run on his real footage and
texted "can't find where the final video is."

Fixed

• dj-edit run and dj-edit deliver now auto-open the output folder
  when done. Previously only dj-edit quickstart did this. Both
  commands now print the location + open out/ on macOS (and xdg-open
  on Linux only when a display is attached, to avoid hanging headless).
• dj-edit score-360 subcommand placeholder — v0.3+ will ship a real
  implementation (content-aware Insta360 yaw scoring). v0.2.1 dispatcher
  handles "script not yet installed" gracefully so the run chain can
  evolve in v0.3 without breaking v0.2.x users.

Upgrade

brew upgrade dj-edit