fix(core,meta,app,android,cli): number episodes the way releases do

AniList's per-season lookup searched for "<title> 2nd Season" and the
scorer picked the base entry again, so Attack on Titan seasons 2-4 and
Jigokuraku season 2 were captioned with season one's names. Episode
names came from streamingEpisodes, which is partial and numbered however
a streaming site counted. Bleach S17 and Mushishi S02/S03 had none.

AniList now walks SEQUEL relations from the match and takes each
entry's episodes from ani.zip, which carries TVDB's season, number and
absolute number. An episode row keeps all three plus its place in the
AniList entry. EpisodeGuide::get matches whichever numbering a file
uses and never answers from another season.

Episodes and fanart are stored as one enrichment. The episode list is
replaced even when empty, and the enrichment is recorded as asked, so a
film is not re-asked every run. Storing a different match drops the old
entry's episode rows. AniList's 4.75:1 bannerImage is no longer stored
as the 16:9 backdrop; ani.zip's 1920x1080 fanart is used instead.

Schema v9 adds the columns and deletes the AniList episode rows and
banners. Matches are kept. Desktop, Android and the CLI now share
service::plan and MetadataService::work. The settings text names
ani.zip. Audit and roadmap in docs/METADATA.md; bug entry B61.

docs/DEVELOPMENT.md

@@ -106,26 +106,22 @@ card (`App::tick_up_next`, `ui::player::up_next_card`) with *Play now* and
 chapters, autoplay on, a next episode, and playback actually running — a paused
 episode is one somebody walked away from.
 
-Done: **per-episode metadata.** `Provider::episodes` fetches an episode list for
-a title that already matched (AniList `streamingEpisodes`, which is titles and
-thumbnails only and no synopsis; TMDB `/tv/{id}` plus every season appended onto
-one more request), stored in `episode_metadata` — schema **v4**. The reconciling
-between a release's numbering and a provider's lives in one tested place,
-`EpisodeGuide::get`: the season and number the filename states, then the
-provider's absolute numbering, then season one for a file that states no season
-at all. That last fallback is what makes `#057` line up with TMDB filing a
-64-episode anime under one season. Episode names show on the title page's rows,
-in the player's title strip and in the "next:" line autoplay prints.
+Done: **per-episode metadata.** `Provider::enrich` fetches the episode list —
+and, for AniList, the series' fanart — of a title that already matched, and
+`Catalog::set_enrichment` stores both and records that it asked (schema **v9**),
+so an empty answer is not re-asked every run. TMDB is `/tv/{id}` plus every
+season appended onto one more request. AniList walks the match's `SEQUEL`
+relations and takes each entry's episodes from ani.zip, which carries TVDB's
+season, number and absolute number — the numbering release groups use. The
+reconciling between a release's numbering and a provider's lives in one tested
+place, `EpisodeGuide::get`. [METADATA.md](METADATA.md) has the audit that drove
+this, the order `get` tries things in, and what comes next.
 
-**A season is a separate lookup on AniList.** `Provider::seasons_are_separate_entries`
-is what splits the two providers: TMDB files every season under one show and
-returns them numbered, while AniList makes each sequel its own entry numbering
-from one (`[Oshi no Ko] 2nd Season`, id 166531, is not `[Oshi no Ko]`, id
-150672). So for AniList each season past the first is searched for by name —
-`<title> 2nd Season`, then `<title> Season 2` — and its episodes are stored
-tagged with that season. The absolute fallback in `EpisodeGuide::get` stops at
-season one for the same reason: without that it answered `S02E01` with season
-one's episode one, which is not a missing caption but a wrong one.
+The first version searched AniList for `<title> 2nd Season` per season and took
+episode names from `streamingEpisodes`; both were wrong often enough to show —
+the search found the base entry again and captioned Attack on Titan's later
+seasons with season one's names, and `streamingEpisodes` is whatever a streaming
+site published. v9 deletes everything they stored.
 
 Done: **matching a title by hand.** `MATCH_FLOOR` is set where a wrong poster
 costs more than none, and the price of that is a few titles it refuses to decide
@@ -145,11 +141,11 @@ rather than storing a miss, so the next run treats the title as one it has never
 asked about. Switching provider still clears everything, hand-picked rows
 included: a `remote_id` means nothing to the other provider.
 
-Worth knowing before chasing a missing name: AniList's episode titles come from
-`streamingEpisodes`, which is what streaming sites published, and for some shows
-it is simply **empty** — all three Oshi no Ko entries have none, while Fullmetal
-Alchemist Brotherhood has 64. There is nothing to fix on our side for those;
-TMDB is the provider that has them.
+Worth knowing before chasing a missing name: ani.zip only lists what TVDB has
+placed. A file it cannot answer is usually a special (`S02E00`), an episode TVDB
+skipped, or one too new to be listed — Attack on Titan's last two files and two
+of Bleach's forty-four are the standing examples. `pstr metadata match` prints
+how many episodes each title got.
 
 Note the glyph trap: egui's bundled fonts cover the transport icons
 (`⏮ ⏭ ⏸ ▶ 🔊 🔇 ⛶`) and *not* `← 💬 ▣`, which draw as an empty box. Anything new