The sidecar config's books map is keyed by the primary SHA-256 (UUID
fallback). A device holding a converted format (KEPUB/PDF) whose hash
lives only in media_item_formats could not resolve its file through
the sidecar.
After inserting the primary-keyed entry, also register the same entry
under each per-format hash from media_item_formats (first write wins,
so a primary hash is never shadowed). Devices now resolve converted
files via the sidecar the same way the server's BookResolver does.
Applied to both the GET and download sidecar builders.
john-okeefe
830741cd65