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.

android/app/src/main/java/io/narl/protonstream/ui/SettingsScreen.kt

@@ -420,7 +420,7 @@ private fun MetadataSettingsDialog(
         title = { Text("Metadata enrichment") },
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                Text("Off by default: enabling sends the titles in your library to a third party, associated with your IP address and subject to their privacy policy.")
+                Text("Off by default: enabling sends the titles in your library to a third party, associated with your IP address and subject to their privacy policy. With AniList, the matched ids also go to ani.zip for episode names and wide artwork.")
                 SettingToggle("Enable enrichment", enabled) { enabled = it }
                 Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
                     MetadataProvider.entries.forEach { option ->