The deep-scan action types weren't selectable builder actions, and Scan Video Server
/ Update Video Database had no movie-vs-TV dimension — inconsistent with the rest.
- video_deep_scan_tv / video_deep_scan_movies are now proper builder blocks
(Deep Scan TV/Movie Library), not just system-automation action types.
- video_scan_server + video_update_database gain a media_type ('all'|'movie'|'show')
config + selector, threaded through. The post-download chain carries the scope on
the scan-done event, so a TV-only rescan updates only TV (stage 2 inherits it).
- refresh_video_server_sections / Plex+Jellyfin refresh_sections scope the server
nudge to the chosen library; auto_video_scan_library now nudges only its library.
- shared normalize_media_type() in sources; update_database skips cleanly when the
singleton scanner is busy. Defaults stay 'all' so existing chains are unchanged.
Seam tests for refresh scoping, scan-server scope+event, update-db scope/inherit/skip.
14a32f6006