docs(media): point plan/journal/park paths at .media-campaign and NeedsProcessing

The campaign-artifact home moved (42bc482) but the copy-paste surfaces still
named the old ones, and a tool's usage block is exactly what an agent runs:

- scripts/media-shows.py, media-tv.py, media-tvdupes.py: usage examples wrote
  plans and journals at the array root. media-apply.py defaults its journal to
  <root>/media-relayout.jsonl, so any run copied from those lines re-creates
  the root-level clutter the vault now forbids. Each block now names
  /mnt/entropy/.media-campaign/ and says why --journal is explicit.
- media-shows.py: --park named the retired media-park; the pile is
  /mnt/entropy/NeedsProcessing/TVShows.
- Jellyfin.md: library-coverage law named /data/media-park; names the pile by
  its current path and records when it moved.
- Media TV Relayout.md: the runnable --park path named media-park.

bats: 822 seams green.

scripts/media-tvdupes.py

@@ -16,14 +16,16 @@ the journal and frees no space until the hold is purged.
 
     python3 scripts/media-tvdupes.py --library /mnt/entropy/TVShows \
         --hold /mnt/entropy/.AGENTTRASH/20261102-tv-duplicates \
-        --out /mnt/entropy/tv-dupes-plan.tsv
-    python3 scripts/media-apply.py apply --plan /mnt/entropy/tv-dupes-plan.tsv \
-        --root /mnt/entropy --journal /mnt/entropy/tv-dupes.jsonl \
+        --out /mnt/entropy/.media-campaign/tv-dupes-plan.tsv
+    python3 scripts/media-apply.py apply \
+        --plan /mnt/entropy/.media-campaign/tv-dupes-plan.tsv \
+        --root /mnt/entropy --journal /mnt/entropy/.media-campaign/tv-dupes.jsonl \
         --metadata-view /var/lib/media-meta/view --apply
-    python3 scripts/media-apply.py verify --plan /mnt/entropy/tv-dupes-plan.tsv \
-        --root /mnt/entropy --journal /mnt/entropy/tv-dupes.jsonl
+    python3 scripts/media-apply.py verify \
+        --plan /mnt/entropy/.media-campaign/tv-dupes-plan.tsv \
+        --root /mnt/entropy --journal /mnt/entropy/.media-campaign/tv-dupes.jsonl
     python3 scripts/media-apply.py sweep --root /mnt/entropy \
-        --journal /mnt/entropy/tv-dupes.jsonl --apply    # empty folders only
+        --journal /mnt/entropy/.media-campaign/tv-dupes.jsonl --apply  # empty folders only
     scripts/media-view.sh reap                           # ghost sidecars above
 
 Then both servers have to be told: the plan moves files on the raw array, and no