A seasoned fashion journalist and her elderly mother were among the three people who were killed when an inferno ripped through their Upper Manhattan apartment building on Monday, officials said.  Yolaine Diaz, 48 – who notably served as the digital fashion and beauty editor for People en Español – was killed when the early Monday blaze ravaged the six-floor walk-up on Dyckman Street in Inwood on Monday, her former employer reported .  Both Diaz and her 73-year-old mother, Ana Mirtha Lantigua, tried to escape the fire through an inner staircase but were overcome by smoke and never made it outside, according to the report.  Yolaine Diaz, 48 – who notably served as the digital fashion and beauty editor for PEOPLE en Español – was among those killed in the massive Dyckman Street fire.…