Fix denominator-corrected-rules plugin issues (complex query, numerator overflow)

[r3code]

See #804 and #842

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 31.30%. Comparing base (3757b66) to head (d4869ff).
⚠️ Report is 29 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/sloth/commands/validate.go	0.00%	15 Missing ⚠️
...o/contrib/denominator_corrected_rules_v1/plugin.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #845      +/-   ##
==========================================
+ Coverage   30.84%   31.30%   +0.46%     
==========================================
  Files         141      149       +8     
  Lines        8689     9228     +539     
==========================================
+ Hits         2680     2889     +209     
- Misses       5770     6088     +318     
- Partials      239      251      +12     

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