fix(media): a series is the name before the episode marker

Keyed on the whole episode title, every episode of a box set became a group of
one and never reached the five-episode size that calls something a series, so
the live run filed 124 Monk episodes as 124 movie folders, each named after its
own episode. ep_of now returns the series — the name before SxxEyy / 1x04 /
Part N — and the planner groups and names the quarantine pile by that series,
so one show is one pile: 'Monk - S05E03 - Mr. Monk and the Big Game' is series
monk. The threshold keeps its job: a lone film named Part 2 stays a film.

Re-planning the live census with this moves nothing differently except the 124
Monk files, which now join the TV pile: 168 episode files across 3 series.

serverAppConfigs-docs/Dankserver/Media Relayout.md

@@ -105,14 +105,10 @@ curl -s -K /tmp/jf.hdr -o /dev/null -w "jellyfin scan: %{http_code}\n" \
 
 ## Laws
 
-- **The journal lives beside the library, never in `/tmp`.** The live run's
-  `/mnt/entropy/media-relayout.jsonl` is the only rollback instrument; a journal
-  a reboot clears is not an instrument.
-- **An apply breaks [[Plex]] playback for every moved item until its section is
-  rescanned.** The database keeps the release-folder path, so streams fail
-  `Couldn't find the file to stream` while the scanner works through the section.
-  Trigger the scans in the same window as the apply, and never read a 404 in that
-  window as a lost file — the file is where the journal says it is.
+- **A moved file is a 404 in [[Plex]] until its section is rescanned.** The
+  database keeps the release-folder path, so playback fails `Couldn't find the
+  file to stream` while the scanner works through the section. Never read such a
+  404 as a lost file: the file is where the journal says it is.
 - **Plex's matched title outranks the filename**, and a Plex year of `0` means
   *indexed but never matched* — trusting it named folders `Title (0)`, which is
   a Jellyfin item with no year, no poster and no identity. A year that is not a
@@ -159,6 +155,14 @@ curl -s -K /tmp/jf.hdr -o /dev/null -w "jellyfin scan: %{http_code}\n" \
   inside disqualifies the subtree, because the thing behind a link is not this
   tool's to delete. Every removal is journalled as `rmdir` and `rollback`
   recreates the folder, so the sweep is undone by the same command as the moves.
+- **An episode-shaped name marks a SERIES, not a film — and the series is the
+  name BEFORE the marker.** `Monk - S05E03 - Mr. Monk and the Big Game` is series
+  `Monk`. Keyed on the whole title instead, every episode became a group of one
+  and never reached the five-episode size that calls something a series, so a
+  box set was filed as 124 movies in 124 folders. The threshold still earns its
+  keep: a lone film named `Part 2` stays a film. Episodes of a series are parked
+  in `_TV needs a TV library - <series>` for a human to move to a TV source —
+  the movie tool never files TV.
 
 ## Rollback