Use TorBox permalinks instead of expiring CDN download URLs

[akhanalcs]

TorBox download links currently use the CDN URL. Those URLs are short-lived and eventually start returning Invalid Presigned Token, which breaks streams (e.g. Plex) after a few hours.

This PR switches the TorBox provider to store TorBox "permalinks" instead of the short-lived CDN URLs, as recommended in the TorBox API docs.

https://www.postman.com/torbox/torbox/request/c6hu0dr/request-download-link

Changes

• In pkg/debrid/providers/torbox/torbox.go, GetDownloadLink now:

  • Still calls requestdl to validate that TorBox will serve the file and to surface API errors.

  • Verifies that the API response contains a non-empty download URL (for sanity checking only).

  • Builds and stores a permalink of the form:

    {{api_base}}/{{api_version}}/api/torrents/requestdl?token={{api_key}}&torrent_id={{torrent_id}}&file_id={{file_id}}&redirect=true

  • Caches this permalink in types.DownloadLink.DownloadLink.

• Added a debug log to show the generated permalink for testing / troubleshooting.

Fixes

Issue: #179

[rennanguisard]

Thanks, man. Just started using your fork for the time being and seems to be fixed.

[masesisaac]

@sirrobot01 kindly bringing this to your attention, it's a much needed fix