Netflix has ordered an eighth season of its romantic drama “Virgin River,” days after production concluded on Season 7. The new 10-episode pickup extends the series to 84 episodes, surpassing “Grace and Frankie” and “Orange Is the New Black” to become the streaming service’s longest-running scripted show. The early renewal comes before Season 7 has a premiere date, a strategy Netflix has used to reduce the wait between installments after industry strikes lengthened gaps. “Virgin River,” adapted from Robyn Carr’s novels and starring Alexandra Breckenridge and Martin Henderson, has remained a reliable performer; Season 6 spent four weeks in Netflix’s global Top 10, peaking at 9.2 million views in its second week.