docs(media): what a verification verdict actually means, and what a rollback can undo

Three things the 2026-10-31 five-library relayout taught, written where the
next operator reads them:

- A verify run must open the servers' databases plain `mode=ro`. Both keep
  their libraries in WAL mode; `immutable=1` skips the write-ahead log, so a
  scanner's own committed rows read as missing and the read can fail as
  "database disk image is malformed". The census page claimed immutable — now
  it says what the code does.
- "No row at the destination" splits into four classes, and only REAL (no row
  at dst AND the file still at src) is the relayout's own damage. Phantom rows
  naming a pre-move path are normal behaviour for both servers. And the owning
  server decides whether a pass can convict: Jellyfin holds no audiobook
  library, so that journal verifies against Plex or it proves nothing.
- A chain of passes rolls back newest journal first, or the tool refuses; the
  refusals measured that day are the tool working, not failing.

The music and audiobook arms moved to their own pages (progressive disclosure;
the parent drops 175 lines and stays the owner of the shared gates, the
executor, the journal law and the rollback). Stale per-run counts destroyed:
episode counts, byte sizes, move tallies for a pass that already happened.

serverAppConfigs-docs/Dankserver/Media Music Relayout.md

@@ -0,0 +1,68 @@
+---
+type: reference
+title: Media Music Relayout
+description: "Re-filing /mnt/entropy/Music by Jellyfin's tag rows: the census, the album key, the refusals."
+tags: [dankserver, media-server, jellyfin, media-relayout]
+timestamp: 2026-10-31T00:00:00Z
+---
+
+# Media Music Relayout
+
+`/mnt/entropy/Music` is rips and discography packs, and Jellyfin has matched and
+tagged almost all of it. `scripts/media-music.py` re-files it into the shape
+Jellyfin's music scanner reads —
+
+    Music/<album artist>/<Album> (<year>)/NN - <Title>.ext
+
+— and the authority is the tag row of the track, never the name the ripper gave
+the file. The shared gates, the executor, the journal law and the rollback live in
+[[Media Relayout]]; this page is the music arm only.
+
+```bash
+# 1. The authority: Jellyfin's audio rows, one per track, with the album and
+#    artist ids its own database carries (the DB opens read-only).
+python3 scripts/media-census.py music --root /mnt/entropy/Music \
+    --out /tmp/music_rows.tsv
+# 2. What is on disk (stat only).
+python3 scripts/media-census.py enumerate --root /mnt/entropy/Music \
+    --out /tmp/music_enum.tsv
+# 3. The plan.
+python3 scripts/media-music.py --root /mnt/entropy/Music --enum /tmp/music_enum.tsv \
+    --rows /tmp/music_rows.tsv --out /tmp/music_plan.tsv \
+    --exceptions /tmp/music_exceptions.txt
+# 4. Read the exceptions file FIRST — it is the review, not a log. Then the same
+#    executor, journal and rollback as [[Media Relayout]] shows, on its own journal.
+scripts/media-apply.py apply --plan /tmp/music_plan.tsv --root /mnt/entropy \
+    --journal /mnt/entropy/media-relayout-music.jsonl --apply
+```
+
+The group is what the tags assert, not where the files sit: **(album-artist tag,
+album, year)**. One album arrives as three disc folders and as two copies of one
+rip, and one MusicBrainz release group is one album. A compilation is one album
+whose tracks name many performers, so it files once under `Various Artists`:
+keying on the performer would file one album once per artist. Two different
+album-artist tags on one album name are two albums, which is what Jellyfin's two
+album items say.
+
+What it refuses:
+
++- **A sidecar is placed by the audio around it, never by its own name.** A
+  `.lrc`, `.txt` or picture that shares a track's stem follows that track and
+  takes the name the track now has, or Jellyfin cannot find it; anything else
+  goes to the album its own folder was placed in, or to the folder whose discs
+  sit one level below it. A folder whose audio belongs to two albums parks its
+  sidecar rather than guessing.
++- **An image album keeps its name.** A folder holding one audio file and a
+  `.cue` is a whole album in one file; numbering it `01 - …` tells Jellyfin to
+  index it as one track.
++- **A video container parks**, because Jellyfin will not index it as music and a
+  rename to `.m4a` would claim it is; **audio no provider row names parks** too,
+  because unmatched audio is a tagging job, not a renaming job.
+
+ONE writer at a time on this array: two rename passes race, and neither journal
+tells. Verify the run against Jellyfin's own tables — see *Proving the move
+landed* in [[Media Relayout]].
+
+## See Also
+
+[[Media Relayout]], [[Jellyfin]], [[Media Audiobook Relayout]]