Proposal: Discogs barcode lookup for exact release matching

[LiTeFlame]

Please add the ability to search by barcode via Discogs.

The main issue is that a single album often has dozens of pressings. When the lookup picks the wrong version, the verification checks fail because the offset data doesn't match the actual disc.

A barcode search would pinpoint the exact physical release we're ripping.

Thanks for the great work on fre:ac.