fix(plugins): delay card-mined until field grouping and YouTube media

- Hold a sentence card's ready report until field grouping finishes
- Report cards waiting on queued YouTube media once it is applied or the download fails
- Proxy reports added notes ready right away when auto-update is off
- Polling keeps enriching the rest of a batch after one note fails
- Update plugin and architecture docs

docs-site/plugins.md

@@ -130,6 +130,6 @@ A panel's `signal` aborts when the user closes it or another panel replaces it.
 
 mpv events: `connection-change`, `subtitle-change`, `subtitle-timing`, `time-pos-change`, `duration-change`, `pause-change`, `fullscreen-change`, `media-path-change`, `media-title-change`, `subtitle-track-change`, `subtitle-track-list-change`, `secondary-subtitle-change`, `secondary-subtitle-track-change`, `secondary-subtitle-delay-change`, `secondary-subtitle-visibility`, `client-message`, and `end-file`. `end-file` gives `{ reason, playlistEntryId, error }`, where `reason` is `eof`, `stop`, `quit`, `error`, `redirect`, or `unknown`.
 
-Anki events: `card-mined` gives `{ noteIds }` once SubMiner has finished filling in a mined card (sentence, audio, image). With `ankiConnect.behavior.autoUpdateNewCards` off, it fires as soon as polling sees the card, and not at all for cards added through the proxy. If field grouping merged the card into an older one, the id may no longer exist.
+Anki events: `card-mined` gives `{ noteIds }` once SubMiner has finished filling in a mined card (sentence, audio, image, and field grouping). For YouTube cards whose media waits on the download, it fires once that media is added or the download fails. With `ankiConnect.behavior.autoUpdateNewCards` off, it fires as soon as SubMiner sees the card. If field grouping merged the card into an older one, the id may no longer exist.
 
 `anki.invoke` takes `{ timeoutMs }` (default 10 seconds), rejects on an Anki error, and never retries, so an action like `sync` or `addNote` runs at most once.