Cali Tucker returns to us this season with the quiet glow of someone who’s been doing far more than singing; she’s been transforming. When we last met her in September with “Last Name,” she was stepping out from the shadow of legacy and planting a flag in her own artistic territory, a moment that felt like watching a door click open on a whole new chapter. Now, with “Santa Baby” , she walks back through that door carrying something softer, heavier, and far more luminous. N