jellyfin-ha bakes the LDAP and SSO auth plugins into its image, and all
outside artifacts must be fetched via artifactapi rather than direct.
- Add remote_generic/jellyfin.yaml proxying repo.jellyfin.org, scoped to
the ldap-authentication plugin zip.
- Add a github.yaml pattern for 9p4/jellyfin-plugin-sso release zips
(GitHub redirects release downloads to objects.githubusercontent.com,
which the existing github remote already follows).