By Tatyana Kekic in Belgrade Serbia is back in the EU’s good books. Thanks to the country’s large lithium reserves, EU politicians have been trying to woo the Balkan state, repeating a mantra which verges on possessive: “Serbia belongs to the EU”. And Serbia is reciprocating. Rather than the usual carping, Serbia’s President Aleksandar Vucic is singing Europe’s praises and pledging loyalty to Brussels. German Chancellor Olaf Scholz went on the diplomatic offensive on July 19, making a rare visit to Serbia’s capital, Belgrade. There, along with European Commissioner Maros Sefcovic, Scholz signe…