fix(arr): give the reconcile loop its translators

#196 built SubtitleAction with an empty backend list, correctly: no
translation backend existed when it was written. #216 then built
translation_backends() and wired it into AppState, so the API can translate.
Merged, the reconcile loop still got Vec::new() and its translate step
reported "no engine" in every real deployment.

Neither branch was wrong alone; the gap only exists once both are in.

crates/arr-daemon/src/main.rs

@@ -492,7 +492,7 @@ fn subtitle_action(config: &Config, notifier: &Notifier) -> Result<SubtitleActio
             config.opensubtitles_username.clone(),
             config.opensubtitles_password.clone(),
         ),
-        Vec::new(),
+        translation_backends(config),
         arr_subs::Syncer::new().with_binary(config.alass_path.clone()),
         arr_probe::Extractor::new().with_binary(config.ffmpeg_path.clone()),
         jellyfin_client(config)?,