Add mechanism to prevent recovering from certain validation failures

[Baptouuuu]

The kind of use case is specified in the documentation.

[codecov]

Codecov Report

❌ Patch coverage is 85.41667% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.96%. Comparing base (c7c8009) to head (17810e3).
⚠️ Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/Validation/Guard.php	33.33%	8 Missing ⚠️
src/Validation/Fail.php	77.77%	4 Missing ⚠️
src/Validation/Success.php	66.66%	2 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #72      +/-   ##
=============================================
- Coverage      97.16%   96.96%   -0.20%     
- Complexity      1087     1105      +18     
=============================================
  Files             77       78       +1     
  Lines           5745     5841      +96     
=============================================
+ Hits            5582     5664      +82     
- Misses           163      177      +14     

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