Using Miche pistard wheels with brakes?

I did some googling and don't see the answer spelled out specifically, which is typical for anything Miche.

Don't do it. It's reasonable to assume for a wheel like this, a racey track set with no visual indication of a brake track and with graphics where a brake track would usually be, that the wall thickness has nothing to give safely. For dedicated track wheels that's a feature, not a bug.

"safe to ride" is a statement from authority. We're random people on the internet who can't even see your wheel and are not qualified to make a judgement for you.

A rim designed for rim brakes will have a rim brake track. If you don't have that, the rim is NOT intended for rim brakes, and won't have enough thickness. A rim brake will initially work, but the touchpoint will wear quicker, and will have less thickness so you'll be risking a rim blow-off much sooner.

Its possible that you'll write off the rim in short order, maybe as little as 1000 km. Or it may survive for a long time - we can't tell you what's "safe" We're showing you the risks, its up to you to to make an informed decision as a competent adult after weighing the risks/benefit.

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My advice would be to sell the track wheels on, and buy a suitable set of wheels used.

Its likely your track wheels are for a 120mm OLD, so using them in a road bike may require frame bending too, and then you're always going to need 120mm rear wheels. Its just not worth it - buy some boring normal wheels which will be cheaper than uncommon track wheels. You might even come out ahead financially.