BP has finally agreed to a peace deal with its Russian partners over the future of their joint venture, TNK-BP. The oil firm announced yesterday that embattled chief executive Robert Dudley will leave TNK-BP by the end of the year, as part of an agreement hammered out with the four Russian billionaires who also own the business. Not surprisingly, the deal appeared to have been closely coordinated with the Kremlin. It follows an unprecedented campaign by state agencies against TNK-BP that left Dudley no choice but to flee Russia, citing harassment. Serbian government officials earlier today insisted that an energy deal with Russia is of the utmost national interest, but the opposition Liberals described it as humiliating. Well, it’s not humiliating yet…