Megan Thee Stallion's lawyers are going to pay Tory Lanez a visit in prison ... because a judge just ordered him to sit for a deposition in a lawsuit she filed. According to new legal docs, obtained ...

This isn't how Tory Lanez wants to get out of prison, but he is -- after suffering a prison yard stabbing so bad, he needs hospital treatment ... TMZ has learned. Shrapnel from Marines anniversary ...