Fix non-interactive anikoto backup downloads

- force anikoto-cli backup runs to auto-select the queued anime title through fzf filter options
- add a regression test for the backup retry environment
- bump the project version to 0.46.3 and document the fix in the changelog and README

README.md

@@ -2,7 +2,7 @@
 
 Local web UI for a system-wide `ani-cli` install.
 
-Current version: `0.46.2`
+Current version: `0.46.3`
 
 ## What it does
 
@@ -125,6 +125,7 @@ Docker notes:
 - Configure the global backup toggle from `/config`
 - When enabled, any failed `ani-cli` queue job automatically retries with `anikoto-cli`
 - `anikoto-cli` ignores the saved quality setting, so backup attempts use the source's default stream quality
+- Backup retries now auto-select the queued anime title non-interactively so the fallback works inside the background download worker
 
 ### Jellyfin handoff