chore(*.psql/*.sql): update all *.psql to *.sql files

queries/triggers/update_scheduled_status.sql

@@ -0,0 +1,9 @@
+CREATE OR REPLACE FUNCTION update_scheduled_episode_status()
+RETURNS TRIGGER AS $$
+BEGIN
+  IF NEW.air_date < CURRENT_DATE AND NEW.status = 'upcoming' THEN
+    NEW.status := 'aired';
+  END IF;
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;