“Charles Osgood, the longtime host of CBS “Sunday Morning” and the voice of CBS Radio’s “The Osgood File,” had a “mild” heart attack Saturday and was rushed to New York’s St. Luke’s-Roosevelt Medical Center, where doctors implanted a stent Saturday evening,” NewsBlues reports. “He was released from the hospital Monday afternoon, just 48 hours after being admitted.” He’ll be back on the air this morning…