fix: Also set inValidNode when CSP starts with comment

[TsekNet]

Addresses #26443 (comment) after #27176 was merged.

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.
  See Changes files for more information.
  • I did this in Ignore comments at the top of XML files #27176, same change message.
• Added/updated automated tests
• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.78%. Comparing base (af40739) to head (58656ab).
Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #27376      +/-   ##
==========================================
- Coverage   63.83%   63.78%   -0.05%     
==========================================
  Files        1737     1737              
  Lines      165290   165147     -143     
  Branches     4429     4429              
==========================================
- Hits       105507   105337     -170     
- Misses      51563    51580      +17     
- Partials     8220     8230      +10     

Flag	Coverage Δ
backend	64.66% <100.00%> (-0.06%)	⬇️

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[georgekarrv]

Thanks for this!