[svdconv] Fix infinite recursion in SvdItem::GetEffectiveProtection() method

[ckudera]

This PR addresses an issue in the SvdItem::GetEffectiveProtection() method, which previously resulted in a segmentation fault (SIGSEGV) due to infinite recursion.

The previous implementation called GetEffectiveProtection() recursively within the for-loop, causing an infinite recursion if no protection value was found. This led to stack overflow and a crash. The solution replaces the recursive call with a call to GetProtection(), which checks the protection value without triggering recursion.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 64.91%. Comparing base (5fa61b5) to head (69f1c94).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
tools/svdconv/SVDModel/src/SvdItem.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1793      +/-   ##
==========================================
- Coverage   64.92%   64.91%   -0.01%     
==========================================
  Files         163      163              
  Lines       34453    34454       +1     
  Branches    19975    19975              
==========================================
  Hits        22367    22367              
- Misses       7928     7933       +5     
+ Partials     4158     4154       -4     

Flag	Coverage Δ
svdconv-cov	40.24% <0.00%> (-0.01%)	⬇️

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Files with missing lines	Coverage Δ
tools/svdconv/SVDModel/src/SvdItem.cpp	54.77% <0.00%> (ø)

... and 3 files with indirect coverage changes