CNN  —  For Ukrainians, more than three years into Russia’s full-scale invasion, the war isn’t just being fought in the trenches. It’s in the museums, and in the cultural heritage they seek to preserve. Amid the continuing onslaught, the country’s historical centers — which, one could argue, hold the cultural identity of Ukraine — have struggled. Heritage sites have been damaged; museums have been looted; artifacts have been stolen. And these catastrophes aren’t random — legal experts and