New metadata: grid origin and grid modified

I’d like to see if the grid was modified within LXC and where the initial grid data came from (LXC internal or name of the software from which it was imported).

This can be a useful indicator to determine how well prepared a track is to be played. I already have smartlists with certain criteria (absence of cues or certain tags) which I use in library grooming sessions. Additional metadata like this would help a lot to refine this.

I tried to work with custom tags but the time and energy required for every additional working step adds up and I’d rather spent it for core tasks. I also want to avoid bloating the amount of tags with that.

Additionally, I suppose some people already built a structure like that. So I suggest to also offer ways to migrate this data. If there are the fields “grid modified”, “grid modified date”, “grid source”, mappings like custom tag -> grid modified, custom tag -> grid source, and in playlist -> grid modified could be useful.