docs(media): the metadata view is live, and duplicate pruning gets a page

`Media Metadata View.md` said "Not deployed on Dankserver — verified
2026-10-31". That was true yesterday and is false now: the overlay is mounted
and both installed quadlets bind it (`view:/data` rw for Jellyfin,
`view:/mnt/entropy:ro` for Plex). The page now states the live shape and the
order that proves it — `media-view.sh verify`, then the `Volume=` lines —
because the whole point of the page is to answer "is the view really serving?".
`AGENTS.md` carried the same stale claim in its summary table.

`Media Duplicate Prune.md` is new: the screen ladder (size, then head+tail
blake2b, then a sparse-window confirmation before anything moves), which copy
survives and why, the guards that each encode a file that would otherwise have
been destroyed (qBittorrent `.!qB` state, year-required with digits kept,
feature length, disc/part exclusion, media containers only), and the law that a
hold on the same volume frees nothing until it is purged. It also carries the
different way `media-verify.py` has to be READ for a prune — `landed: 0` is the
correct end state because no server may index the hold — and the planner bug
that class explains: when the planner re-derived "largest wins" from the hold
list alone it dropped every keeper out of its own group and pruned 17 files
instead of 205.

`Media Relayout.md` keeps a one-line pointer; carrying the whole procedure there
pushed it past the vault's 500-line ceiling, which is the linter telling the
truth about progressive disclosure.

serverAppConfigs-docs/Dankserver/Media Relayout.md

@@ -3,7 +3,7 @@ type: reference
 title: Media Relayout
 description: "Census, plan and apply the movie, TV, music and audiobook libraries: the gates, the refusals, the rollback."
 tags: [dankserver, media-server, jellyfin, plex, procedure]
-timestamp: 2026-10-30T00:00:00Z
+timestamp: 2026-11-01T01:00:00Z
 ---
 
 # Media Relayout
@@ -109,6 +109,8 @@ HTTPD close without a single byte; and the same HTTPD drops requests that carry
 no `Accept` and client-identifier header (see the scan block above for the form
 that works).
 
+A duplicate prune is the same census and the same proof, with its own keep rules: [[Media Duplicate Prune]].
+
 ## TV in the movie library
 
 A box set that arrives in the movie share stays there until someone moves it: