refactor(schedules): use Range object for hour definition in EventWatchSchedule

Replace the string '7-23' with new nodeSchedule.Range(7, 23) for the hour configuration.
This change aligns the schedule definition with the explicit Range object type,
potentially improving type safety or ensuring compatibility with the underlying node-schedule library behavior.

src/schedules/EventWatchSchedule.ts

@@ -58,7 +58,7 @@ export class EventWatchSchedule implements Schedule {
   start() {
     const schedule = nodeSchedule.scheduleJob('event-watch', {
       minute: [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55],
-      hour: '7-23',
+      hour: new nodeSchedule.Range(7, 23),
     }, () => this.watchEvents());
     console.debug('Start schedule:', schedule.name);
   }