means you could easily add this

although wait you’d have to presumably re-fetch the raw post record. hmm not so easy

you need a getblob followed by a createblob

or is it called uploadblob rather than createblob, I forget

it is uploadblob

the interesting question is if you can post with a ref to someone else's blob

you cannot

or at least, you shouldn't be able to :P

I don't think I've tested it, at least, not recently