For Constance Zimmer, getting vulnerable with her ‘UnReal’ character wasn’t easy

It’s the sort of news that might have had fictional TV impresario Quinn King reaching for her walkie-talkie to launch a curse-laced tirade: It was reported earlier this week that “UnReal’’s” upcoming fourth season could be its last.

But Constance Zimmer, who portrays the tough-as-nails reality…