Input guard for flagging used input (JSON entries), raising exception when some remain unused

[Griger5]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.65217% with 3 lines in your changes missing coverage. Please review.

Project coverage is 90.13%. Comparing base (0144d1a) to head (6239aa5).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/input_guard.hpp	94.64%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #395      +/-   ##
==========================================
+ Coverage   89.74%   90.13%   +0.38%     
==========================================
  Files          44       45       +1     
  Lines        2194     2270      +76     
  Branches      110      127      +17     
==========================================
+ Hits         1969     2046      +77     
+ Misses        160      156       -4     
- Partials       65       68       +3     

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