* feat(cmd): make artwork explain/refresh accept an id without its kind
The kind can now come from the id itself: a full artwork id (al-<id>)
carries it in the prefix, and a bare id is resolved across tables via
GetEntityByID. The explicit <kind> <id> leader still works.
* fix(cmd): keep refreshing resolvable ids when others fail to resolve
resolveArtworkTargets now collects a self-describing id it cannot resolve
as a failure instead of aborting, so refresh reports and skips the bad ones
and still queues the rest, matching refreshItems per-item behavior. explain
stays strict and rejects any unresolved input.
Like Subsonic's setStar/setRating, the Jellyfin favorite and rating
endpoints now broadcast a refreshResource event, so the web UI updates
immediately when a Jellyfin client changes an annotation.
Also fixes model.GetEntityByID to propagate unexpected repository errors
instead of reporting them as not-found, preserving the 500-vs-404
distinction for all its callers.
