Not the gods, her brother set it up
But her brother already leave a long time ago plus the dried leaves looks like a sign
However, they're "dried" flowers, they could have been left there ages ago and they'd look the same. Also we see the brother with the same flowers while saying that he doesn't deserve to act like her brother now or something like that, so we can asume he did leave the documents for her to find whenever she went in that room because he knew Medea would do something about it. Well, anyways this is what I believe based on what we have been shown so far (=γ»Ογ»=)
Heli and Medea are such good actors now the public is on her side i wonder what will happens next. I think the gods are on her side bcs how come she stumbled upon that important document the moment she needs it.