Canadian heavy crude rallied Tuesday as geopolitical risk in the Middle East began reshuffling global barrels in real time. Heavy Western Canadian Select strengthened in Alberta to a discount of $11.80 per barrel to the monthly average of West Texas Intermediate, according to Modern Commodities pricing. That marks the narrowest differential since November and a clear signal that heavy sour alternatives are suddenly back in favor. The move comes as Iraq begins shutting in output of roughly 1.6 million bpd due to the Strait of Hormuz crisis. Iraqi…