Enable LUFS scan

[TheDreadPirate]

I'm not sure about the OGG headers, but for my FLACs and MP3s the audio normalization will put a dB value in the database entry for each song. And the client, Finamp usually in my case, then reads that dB value and adjusts the output accordingly. In the playback information in Finamp it will list the dB normalization value on the far right.

I'm not sure how Finamp would handle there being both an OGG header and a normalization value in the Jellyfin DB.