Thanks for your answer and taking the time! Borgmatic search I did not know. That is an amazing tool. You are right about the mounting. My way of dealing with that is a NFS share I mount RW so I can restore to that and than copy whereever. This might it be ideal for very large restores though. Initially I thought I could borgmount to the NFS share and then access the filesystem via NFS. But this does nof work I suppose as Borg only lives inside the container. Generally I do like having Borg and Borgmatic containerized as almost everything else I selfhost but it adds complexity restoring. Anyways great project, it is just so powerful and in many ways elegant. Really enjoy using it!
Try Zotero. It is a complete literature databas but it’s PDF reader is very good at extracting images and text. Works on all OS, web and mobile. Native Linux client has been very smooth for me. Oh, terminal it doesn’t do though. If you want to extract a large amount in an automated way, its probably not the right tool.