docs(media): campaign artifacts live in /mnt/entropy/.media-campaign

The array root carried 48 planning artifacts (journals, plans, run logs)
accumulated by the relayout campaigns since 2026-11-02. They sit beside the
libraries now, which is how a media server ends up indexing a journal.

Moved all 48 (219.8 MiB) into the dot-directory `/mnt/entropy/.media-campaign`
with a journaled `media-apply` run (plan, apply, verify — 48 verified at their
targets, 0 root files left). Jellyfin and Plex ignore dot-directories, and the
overlay view exposes the array root to both servers, so the same pollution
existed on the view side.

Every vault page that named a root-level journal path is rewritten to the new
home (26 occurrences across 6 pages), and the law is stated once, in
[[Media Relayout]], which owns the tool chain: `media-apply.py` defaults its
journal to `media-relayout.jsonl` beside `--root`, so a run that omits
`--journal` recreates exactly the root-level log this now forbids.

serverAppConfigs-docs/Dankserver/Media Audiobook Relayout.md

@@ -41,7 +41,7 @@ python3 scripts/media-audiobooks.py --root /mnt/entropy/Audiobooks \
 #    library too ([[Audiobookshelf]]) — otherwise it keeps rows for folders that
 #    no longer exist.
 scripts/media-apply.py apply --plan /tmp/ab_plan.tsv --root /mnt/entropy \
-    --journal /mnt/entropy/media-relayout-audiobooks.jsonl --apply
+    --journal /mnt/entropy/.media-campaign/media-relayout-audiobooks.jsonl --apply
 ```
 
 The group is the identity Plex asserts in its own database — **(narrator, book,
@@ -68,7 +68,7 @@ no chapter row names, and a loose file in a folder holding two books all park un
 that unrelated books share, or a chapter number mistagged as the artist (`0.4`).
 `Various Artists` is not a placeholder — that is a multi-cast read.
 
-The reviewed plan lives at `/mnt/entropy/media-relayout-audiobooks-plan.tsv`; it
+The reviewed plan lives at `/mnt/entropy/.media-campaign/media-relayout-audiobooks-plan.tsv`; it
 applies on its own journal, behind the music writer, and then refreshes the Plex
 section. Verify it with `--db-kind plex` — Jellyfin holds no rows here, so a
 Jellyfin pass proves nothing either way.