Pete Alonso was back in the Mets lineup one day after getting hit with a pitch right below the ear Saturday night by Los Angeles Angels right-hander Jose Soriano. With Alonso healthy, the argument over whether or not the Mets should enact some sort of retribution for the 84 times they’ve been beaned by other pitchers has died down somewhat, but that can’t last long. The question the Mets are grappling with is intent: If it wasn’t intentional, why should they retaliate? “Good question,” Alonso said Sunday afternoon at Citi Field.