ances of the offense that the defendant proffers as a basis for a sentence less than death."' Eddings v. Oklahoma, 455 U.S. 104, 110 (1982) (quoting Lockett v. Ohio, 438 U.S. 586, 604 [1978]). See also Eddings, at 113-14 (1982) (both due process and the Eighth Amendment require that the defendant be abl