Attachment search by forum

Hi, like to start by saying I am generally really impressed with the software as I near a decade of using it for my forum.

That said, it's the fact my forum is approaching ten years that we need to start some deep pruning as our attachments are getting rather large. We have a specific subforum that is for archived posts, and it's picture-heavy. A field in the Attachment search to limit to a certain forum would be great. Then I could more easily prune the pictures out of this archived forum - the text is what we need to keep, we don't need the photos as well.

I'm thinking I could do this through the database in the backend, but that wouldn't actually remove the pictures from the server, it would just sever the connection in the database.