docs(tv): the parked-folder merge, and the laws that gate it

A parked folder whose name parses to a registered show merges into the row
that owns the show. The proof is the episode rows standing under the owner
folder — never the id-less folder list, because one tvdb id can carry two
`Series` rows and an id-less folder that parses gets identified on its own
and keeps its own folder, offering the show twice.

No library file moves while `Scan Media Library` is Running: wait for a
Running sighting and then two consecutive Idle polls, because a gap between
sub-tasks reads as finished. Both sides speak different path dialects (the
server records the container coordinate, the journal speaks the array), so a
join that forgets the translation reads as an empty library.

Lands on [[Media TV Relayout]] — the page that owns the TV arm — so
`Media Relayout.md` stays under the OKF ceiling.

serverAppConfigs-docs/Dankserver/Media TV Relayout.md

@@ -171,6 +171,36 @@ sequel (410031), the 2026 Hokuto no Ken remake (465216) and `Mugyutto! Black
 Clover` (378762) offered for Black Clover. It is why the map is approved by hand
 and the sheet is never fed to the planner.
 
+**A parked folder merges into the row that owns the show.** The folder that never
+got an id usually holds episodes the identified folder for that show lacks, and
+the server shows the audience neither: the parked copy is invisible and the owner
+reads as a short series. One `media-apply.py` plan per show, built from the
+server's own rows:
+
+- the **owner is the folder whose `Series` row carries the tvdb id**; the parked
+  side is the folder with the same words and no id (or the same id under a second
+  row — see the law below);
+- the **comparison is episode identity, not filename**: which (season, episode)
+  the provider row gives each file, read straight out of the server. Release
+  folders renumber — one park carried `S01E01-11` of a show tvdb books as seasons
+  2 and 3, and every episode runs the same eleven minutes, so neither the marker
+  nor the duration says what one query into the rows says;
+- **a season the owner has no file in moves whole**: `mkdir` the `Season NN`,
+  then one row per file with its name unchanged — the folder shape is the
+  contract, the file name is not;
+- **a subtitle pack is re-keyed, never just moved**: a sidecar attaches only when
+  its stem equals the video's, so each `.srt` has to land on the OWNER's stem with
+  the language suffix kept (`… - The Cat and the Claw (1).en.srt`). Moved under
+  its release-group name it stays a folder of 88 subtitles no player ever offers;
+- **the same episode on both sides is the operator's call**, never a plan row:
+  which copy survives is a quality judgment — the parked copy is usually the
+  bigger one, and a re-cut is not a worse one — and the parked file often carries
+  no title to align by. Those pairs are listed and left alone.
+
+The two sides speak different path dialects, since the server records the
+container coordinate ([[Jellyfin]]) and the journal speaks the array; a join that
+forgets the translation returns zero rows and looks like an empty library.
+
 ## Laws of this arm
 
 - **A folder that names two series is not evidence of two series — the files
@@ -187,6 +217,16 @@ and the sheet is never fed to the planner.
   them, per-season counts equal, and no duplicate `SxxEyy` key anywhere prove
   the layout is already correct. Renumbering files under that evidence buys
   nothing and can silently mislabel an episode.
+- **One tvdb id can carry two `Series` rows, so the id-less folder list proves
+  nothing about a merge.** A parked folder whose words parse to a registered show
+  gets identified on its own and keeps its own folder: the count of id-less
+  folders drops, and the library now offers the same show twice. Prove a merge by
+  the episode rows standing under the owner folder, never by that list.
+- **Move library files only while `Scan Media Library` is Idle.** A rename that
+  lands under a running scan is a row the server read a moment ago pointing at a
+  path that no longer exists. `ScheduledTasks` is the read ([[Jellyfin]]); wait
+  for a `Running` sighting and then two consecutive `Idle` polls, because a gap
+  between sub-tasks reads as finished.
 
 ## See Also