Fix: limit to MAX_FS_THREADS in more places

[emmercm]

RE: #1408

[codecov]

Codecov Report

Attention: Patch coverage is 82.60870% with 8 lines in your changes missing coverage. Please review.

Project coverage is 92.69%. Comparing base (5f522cb) to head (b41ec74).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/modules/dats/datScanner.ts	66.66%	3 Missing ⚠️
src/types/files/fileCache.ts	0.00%	3 Missing ⚠️
src/modules/directoryCleaner.ts	92.30%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1435      +/-   ##
==========================================
+ Coverage   92.68%   92.69%   +0.01%     
==========================================
  Files         118      118              
  Lines        7544     7542       -2     
  Branches     1631     1729      +98     
==========================================
- Hits         6992     6991       -1     
+ Misses        551      526      -25     
- Partials        1       25      +24     

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[github-actions]

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