As a long time Proton customer...I am fairly certain Proton has always been completely upfront that they will comply with lawful requests for information from the Swiss authorities, if response is obligated by Swiss law. Therefore this isn't especially surprising.
It's wild to me that people are downvoting this. Nobody is going to jail for you...
The key is and always has been to make sure that someone like Proton simply doesn't have the information so they can't give it away.