Pakistan is unlikely to meet a target for Russian crude to make up two-thirds of its oil imports, despite attractive prices, hampered by a shortage of foreign currency and limitations at its refineries and ports, officials and analysts say.The cash-strapped South Asian nation became Russia's latest customer snapping up discounted crude that has been banned from European markets due to Russia's war on Ukraine. Its first cargo arrived in June and a second is now under negotiation.It is targeting 100…