Artificial intelligence (AI) has turned electricity into one of the most important investment themes on the market. The data centre boom isnât just about chips, servers, and cloud software. Itâs about power. Lots of it. Data centres need reliable electricity around the clock, and as artificial intelligence workloads grow, that demand is spreading across North America. Thatâs why Boralex (TSX:BLX) looks like one Canadian power stock built f…