Support for minimally tagged files and MusicBrainz metadata retrieval

[SomeoneWhoCares]

Instead of retagging my files from time to time I'd like to just add MusicBrainz id tags and MusicBee should pull fresh tags from MusicBrainz db.
This should work with cue+flac, flac with embedded cue and also for single tracks.

So what I want is to tag my files only with the bare minimum of MusicBrainz id tags and leave all other tags out so I don't have to retag them in the future.
MusicBee would need to keep the metadata in some internal db and fetch updated tags from time to time, it should not need to modify my files in any way as I use read only network shares.

Example cue

Code

REM MUSICBRAINZ_ALBUMARTISTID "d93257e0-a98e-48e6-a977-f318357b9e1a"
REM MUSICBRAINZ_RELEASEGROUPID "09810a74-d9f4-35e5-a5f5-63bf8b1a908e"
REM MUSICBRAINZ_ALBUMID "d93257e0-a98e-48e6-a977-f318357b9e1a"
FILE "image.flac" WAVE
  TRACK 01 AUDIO
    INDEX 00 00:00:00
    INDEX 01 00:00:32
  TRACK 02 AUDIO
    INDEX 00 05:40:00
    INDEX 01 05:41:30
  TRACK 03 AUDIO
    INDEX 00 11:27:33
    INDEX 01 11:27:52
  TRACK 04 AUDIO
    INDEX 00 17:29:10
    INDEX 01 17:30:22
  TRACK 05 AUDIO
    INDEX 00 22:00:54
    INDEX 01 22:02:25
  TRACK 06 AUDIO
    INDEX 00 26:38:20
    INDEX 01 26:40:02
  TRACK 07 AUDIO
    INDEX 00 29:50:05
    INDEX 01 29:51:45

Actually the album id should be enough to get all metadata for a single file + cue.
Now MusicBee would need to fetch all associated metadata, store it internally and present it like normal.
There should also be an error indicator if the id could not be found.
Just to make sure, MusicBee must not edit any of my files nor must it store any additional files alongside my music files.