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

queries/functions/update_scheduled_on_watch.sql

@@ -0,0 +1,11 @@
+CREATE OR REPLACE FUNCTION update_scheduled_on_watch()
+RETURNS TRIGGER AS $$
+BEGIN
+  UPDATE scheduled_episodes
+  SET status = 'watched'
+  WHERE show_id = NEW.show
+  AND season_number = NEW.season_number
+  AND episode_number = NEW.episode_number;
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;