perf: compile regexps once at package level

[bfabio]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 46.08%. Comparing base (ef5cc7a) to head (1287995).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
validators/common.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #320      +/-   ##
==========================================
+ Coverage   45.87%   46.08%   +0.21%     
==========================================
  Files          14       14              
  Lines        1090     1098       +8     
==========================================
+ Hits          500      506       +6     
  Misses        560      560              
- Partials       30       32       +2     

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