chore(core): immediately return None value in NumericConvertedDictParser

[AndreyMarkinPPC]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.84%. Comparing base (5ebb9d2) to head (6546e28).
⚠️ Report is 89 commits behind head on main.

Files with missing lines	Patch %	Lines
libs/core/garf/core/parsers.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #276      +/-   ##
==========================================
+ Coverage   88.23%   88.84%   +0.61%     
==========================================
  Files          61       73      +12     
  Lines        2600     3264     +664     
==========================================
+ Hits         2294     2900     +606     
- Misses        306      364      +58     

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