Fix limit to only allow positive value on validation on Finder::rows()

[samsonasik]

$limit 0 must not allowed.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c45927f) to head (4df276c).
⚠️ Report is 64 commits behind head on main.
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Additional details and impacted files

@@             Coverage Diff              @@
##                main       #39    +/-   ##
============================================
  Coverage     100.00%   100.00%            
- Complexity        45        81    +36     
============================================
  Files              4         7     +3     
  Lines            122       237   +115     
============================================
+ Hits             122       237   +115     

Flag	Coverage Δ
tests	100.00% <100.00%> (ø)

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