David Robb Labor EditorEXCLUSIVE: The pace of initial unemployment claims for Californians previously working in the state’s arts, entertainment and recreation sector has slowed dramatically in recent weeks, falling for three consecutive weeks to the lowest levels since the coronavirus pandemic shut down venues across the state and the country in mid-March.The steady decline of initial claims in August also coincides with the termination of the $600-a-week federal unemployment benefit that ended