Rotate / flip PDFs?

I have a bunch of documents which are upside down (but which I didn't realise until Docspell slurped them in and previewed them).

Have you thought yet about adding the option to rotate a PDF. Eventually, you may even be able to use some heuristics to propose flips/rotations automatically (e.g. if you can't OCR much text, but can after rotating, or by training a model to detect upside down text, etc)