docs(media): one page for the metadata view, and the three pages it re-points

New owner page Dankserver/Media Metadata View.md: the shape, the two binds and
why Plex keeps the /mnt/entropy container path, the commands, the laws (SSD-only
upper layer, never mount over an unmounted array, never delete through the view
because a whiteout only hides the array's copy, reap after any relayout, inotify
does not cross the merge), the failure signatures, and the rollback.

Jellyfin.md: /data is the view, so Local metadata works; the
"Read-only file system : '/data/…/movie.nfo'" line that used to be expected noise
is now the signature of a missing view. Plex.md: same bind, one fact changed.
Media Relayout.md: two new laws for the metadata that does not follow a rename.
AGENTS.md: runbook-index row plus a summary row. Root index regenerated.

serverAppConfigs-docs/Dankserver/Plex.md

@@ -4,7 +4,7 @@ description: "Plex Media Server is a **containerized media server on Dankserver*
 tags:
   - dankserver
   - plex
-timestamp: 2026-10-21
+timestamp: 2026-10-30
 ---
 
 # Plex
@@ -13,7 +13,8 @@ Plex Media Server is a **containerized media server on Dankserver**: a podman
 quadlet (`plex.service`) under the systemd **user** generator, generated from
 `dankserver/plex/quadlet/plex.container`. It shares the host with a second live
 media server, [[Jellyfin]] (`jellyfin.service`, listening on 8096); both serve
-from the same read-only Entropy Volume mount.
+from the same tree — the [[Media Metadata View]] overlay — so the Kodi-format
+sidecars Jellyfin writes are the files Plex reads, with no copy and no sync.
 
 **Host:** Dankserver — **Ports:** 32400/tcp (PMS web + API), 32400 is the
 only port PMS needs for client streaming; LAN clients connect directly,
@@ -26,7 +27,7 @@ public traffic can be fronted by Caddy like every other vhost.
 | Runtime | podman quadlet, `plex.service` (user manager) — migrated from the native `plexmediaserver.service` OS-package unit (2026-09) |
 | Image | `lscr.io/linuxserver/plex:1.43.5.11029-6bf8af3f0-ls329` (pinned; verified == the registry's `latest` manifest digest at pin time: `sha256:8f655bad…e9e2334`) |
 | Data root | `/var/lib/plexmediaserver` bind-mounted **in place** as `/config` (RW) — the migration moved zero bytes |
-| Media | `/mnt/entropy` mounted at the same absolute path **read-only** — every library path in the PMS database stayed valid, zero re-scan |
+| Media | `/mnt/media` (the [[Media Metadata View]] overlay) bound at the same absolute path `/mnt/entropy` **read-only** — every library path in the PMS database stayed valid, zero re-scan |
 | Identity | fleet rootless model — container root maps to the `dank` user (1000:1000); the deployer chowns the data root on first cutover |
 | Port | `32400/tcp` published on `0.0.0.0` — zero client reconfiguration |
 | Network | `dankserver_appnet`, alias `plex`; Tautulli reaches it at `http://plex:32400` |
@@ -38,7 +39,8 @@ public traffic can be fronted by Caddy like every other vhost.
 
 The migration moved zero bytes: the container bind-mounts the native data
 root where it already lived, and the media archive re-mounts at
-`/mnt/entropy` inside the container, so every absolute library path in the
+`/mnt/entropy` inside the container — only the HOST side of that bind has moved
+(array, then the overlay view), so every absolute library path in the
 PMS database keeps resolving. The one metadata change: rootless podman
 cannot map the real host uid 997, so the fleet model applies — container
 root runs as the `dank` user, and the deployer adopts the data root with