feat: implement dynamic MTU configuration for WireGuard connections

[soffokl]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 25.99%. Comparing base (993affc) to head (800fc7e).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
services/wireguard/endpoint/proxyclient/client.go	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6215      +/-   ##
==========================================
+ Coverage   25.96%   25.99%   +0.03%     
==========================================
  Files         544      544              
  Lines       31555    31562       +7     
==========================================
+ Hits         8192     8204      +12     
+ Misses      22517    22514       -3     
+ Partials      846      844       -2     

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