Let not your heart be troubled!
That judge isn't stupid enough to jail Trump. The judge is a member of The System. He makes a much better living as a glorified government lawyer than he ever could in the private sector, especially in a profit-making enterprise. His daughter, also, seems to be getting fabulously wealthy through patronage by Democrats. Likely that patronage is driven by Merchan being one of them, and temporarily in control of the Democrats' latest Hail Mary pass against Trump.
Putting Trump in jail would risk losing the Republic, as we know it. Who knows how Merchan would fare if we descended into chaos and forty percent of the people started treating the government as its ruthless enemy?
Merchan has way to much to lose to risk it.