Monitor internet and LCO connectivity

[albireox]

From the RORR RID-017 recommendation.

For now we will close if the connection to the LCO internal network or the internet fails.

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 45 lines in your changes missing coverage. Please review.

Project coverage is 29.43%. Comparing base (7235a17) to head (1819687).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/gort/overwatcher/alerts.py	29.03%	22 Missing ⚠️
src/gort/overwatcher/overwatcher.py	0.00%	21 Missing ⚠️
src/gort/tools.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #46      +/-   ##
==========================================
- Coverage   29.46%   29.43%   -0.03%     
==========================================
  Files          39       39              
  Lines        6007     6033      +26     
  Branches      921      925       +4     
==========================================
+ Hits         1770     1776       +6     
- Misses       4218     4238      +20     
  Partials       19       19              

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