chore: update signal handle by tce

[Freyskeyd]

Description

Update the TCE to catch SIGTERM signal coming from the OS

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (6e72999) 65.71% compared to head (5e9def2) 67.25%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
crates/topos/src/components/node/mod.rs	50.00%	1 Missing ⚠️
crates/topos/tests/utils.rs	98.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #417      +/-   ##
==========================================
+ Coverage   65.71%   67.25%   +1.54%     
==========================================
  Files         223      223              
  Lines       11921    11923       +2     
==========================================
+ Hits         7834     8019     +185     
+ Misses       4087     3904     -183     

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[dvdplm]

We should have a test for this (this == shutdown), but it'd have to be an e2e test I believe.

[Freyskeyd]

@dvdplm Yes I don't know if it is really possible to unit tests the signal handling on that part, sending the SIGTERM to the current PID would just kill the test process I think?