This trial tests colchicine to see if it can reduce inflammation in blood vessel plaques in high-risk patients with diabetes or pre-diabetes who recently had a heart attack or stroke. The goal is to prevent future cardiovascular events by reducing plaque inflammation. Colchicine is an ancient drug with anti-inflammatory effects, historically used for conditions like gout and familial Mediterranean fever, and has shown promise in reducing cardiovascular events by targeting inflammation in blood vessel plaques.