Overhaul stats: Use broadcast channel for events in UDP Server

[josecelano]

This continues this refactor for the UDP core package.

[josecelano]

ACK 37c8f2b

[codecov]

Codecov Report

Attention: Patch coverage is 96.55172% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.01%. Comparing base (6806346) to head (37c8f2b).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
...dp-tracker-server/src/statistics/event/listener.rs	87.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1394      +/-   ##
===========================================
+ Coverage    81.99%   82.01%   +0.01%     
===========================================
  Files          232      232              
  Lines        17066    17051      -15     
  Branches     17066    17051      -15     
===========================================
- Hits         13994    13985       -9     
+ Misses        2828     2821       -7     
- Partials       244      245       +1     

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