Graceful shutdown for event listeners

[josecelano]

Events listeners listen for the cancellation request instead of directly for the CRTR+c signal. This will allow implementing centralized policies for shutdown and alternative conditions.

In the future, we should implement the same for all tasks, including:

• HTTP servers using axum: torrust_server_lib::signals::global_shutdown_signal
• Job to update metrics: torrust_tracker_swarm_coordination_registry::statistics::activity_metrics_updater::start_job
• Torrent cleanup jonb: torrust_tracker_lib::bootstrap::jobs::torrent_cleanup::start_job

[josecelano]

ACK d2e75e3

[codecov]

Codecov Report

Attention: Patch coverage is 80.29197% with 27 lines in your changes missing coverage. Please review.

Project coverage is 84.60%. Comparing base (1ad19e7) to head (d2e75e3).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
...dination-registry/src/statistics/event/listener.rs	61.53%	4 Missing and 1 partial ⚠️
...ages/tracker-core/src/statistics/event/listener.rs	44.44%	4 Missing and 1 partial ⚠️
...http-tracker-core/src/statistics/event/listener.rs	72.72%	2 Missing and 1 partial ⚠️
.../udp-tracker-core/src/statistics/event/listener.rs	72.72%	3 Missing ⚠️
...s/udp-tracker-server/src/banning/event/listener.rs	75.00%	3 Missing ⚠️
...dp-tracker-server/src/statistics/event/listener.rs	72.72%	3 Missing ⚠️
src/bootstrap/jobs/manager.rs	70.00%	3 Missing ⚠️
src/main.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1587      +/-   ##
===========================================
+ Coverage    84.59%   84.60%   +0.01%     
===========================================
  Files          287      287              
  Lines        21382    21447      +65     
  Branches     21382    21447      +65     
===========================================
+ Hits         18088    18146      +58     
- Misses        2979     2985       +6     
- Partials       315      316       +1     

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[josecelano]

I've opened a new issue to do the same for other jobs not related to events.