Refactor SentryReporter for better breadcrumb handling

Improve the way breadcrumbs are handled in SentryReporter. Replace hardcoded 'breadcrumbs' string with a constant and use it to fetch event data. Also, ensure that breadcrumbs are ordered by UTC time, enhancing readability and consistency of event logs. Exception handling is maintained for any issues during this process.

src/tribler/core/sentry_reporter/sentry_reporter.py

@@ -387,12 +387,11 @@ def _before_send(self, event: Optional[Dict], hint: Optional[Dict]) -> Optional[
  event = self.scrubber.scrub_event(event)
 
  # order breadcrumbs by timestamp in ascending order
- if breadcrumbs := event.get('breadcrumbs'):
+ if breadcrumbs := event.get(BREADCRUMBS):
  try:
- event['breadcrumbs'] = order_by_utc_time(breadcrumbs)
+ event[BREADCRUMBS][VALUES] = order_by_utc_time(breadcrumbs[VALUES])
  except Exception as e:
  self._logger.exception(e)
-
  return event
 
  # pylint: disable=unused-argument