KYIV (Reuters) – Ukraine and Russia on Wednesday announced their first exchange of prisoners of war in nearly five months, with more than 200 freed by each side after what both said was a complex negotiation involving mediation by the United Arab Emirates. Russia’s Defence Ministry said 248 military personnel had been handed over by Ukraine. Kyiv said it had brought home 230 people – 224 soldiers and six civilians – in what it said was the largest documented swap of troops so far. The UAE’s foreign ministry acknowledged its role, saying in a statement that the swap was made possible by its “st…