For much of her musical career and indeed her life, Lalah Hathaway’s legendary last name likely mattered most to the people who encountered her. There was a novelty to Hathaway’s debut recording in 1990­­­­­­­­­­­­­­­­­­—the daughter of a legendary soul singer makes good—though 18 years and four recordings later—Hathaway is a fully-grown woman who can stand…