Has anyone tasted the seeds of Caragana boisii or Siberian pea shrub (smaller variety)?

Hi Everyone!

I'd like to plant a non invasive, edible, perennial legume bush in zone 7a to improve the soil (nitrogen) and to eat the seeds (I don't mind if they are bland, I'll just season them) for their protein content.
I am looking at Caragana arborescens and especially Caragana boisii, a smaller variety, because my garden is on a micro lot. Has anyone tasted the latter one?

 There's a long thread on eating caragana arborescens here: https://permies.com/t/162705/permaculture/Testing-edibility-Caragana-Arborescens-Siberian , but I don't recall reading anything about other caragana species.

Our garden is zone 7a as well, and I'd like to get some caragana planted!

On the Plants for a Future (pfaf.org) website I found Caragana boisii, and it says that the seeds of the boisii and arborescens varieties should be simiar (edible without much flavour). Other than this I found nothing about how it tastes which is why I am asking people here on permies.

Nurseries They sell the arborescens and pendula varieties in my country as ornamental plants. This means that these plants are not invasive here (zone 7a), right?
Or nurseries mostly care about profit and not maintaining the homeostasis of the eco system?

In general, if a plant lives in a zone which is at the end of it's habitat spectrum, it shouldn't be as invasive and vigorous as if it lives in a place which is in the middle of the spectrum, right? For example if Caragan arborescens' habitat is in USDA hardiness zone 2-7, then if I plant it in zone 7a, it shouldn't be as vigorous, and invasive as it would be in say zone 4, right?

Hard to say how it will behave in your area, but I can say that caragana isn't listed as an invasive species anywhere in the EU, according to the Invasive Alien Species Regulations.

It possibly could be invasive given the right environment, but it's not recognised as a problem and is not illegal to plant.

Do the seeds of the different type of Caragana plants taste similarly?