fix(calendar): mark channel completed on no-events fetch (#22137)

No-events branch left channels stuck on syncStatus=ONGOING and stopped
bumping the active metric (flatlined dashboard), since
markAsCalendarEventListFetchPending only resets the stage.

Switched it to markAsCompletedAndMarkAsCalendarEventListFetchPending so
status, syncedAt, throttle and the metric reset properly, matching the
messaging side. Regression from #22015.

packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service.ts

@@ -87,7 +87,7 @@ export class CalendarFetchEventsService {
               workspaceId,
             );
           } else {
-            await this.calendarChannelSyncStatusService.markAsCalendarEventListFetchPending(
+            await this.calendarChannelSyncStatusService.markAsCompletedAndMarkAsCalendarEventListFetchPending(
               [calendarChannel.id],
               workspaceId,
             );