fix: fix error bitsize of jobservice reaper scan locks

[chlins]

Change the bitSize from 16 to 64 in the jobservice reaper, the 16 is too small when the redis cursor over the max value of int16.

Fixes: #18486

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Comprehensive Summary of your change

Issue being fixed

Fixes #18486

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[codecov]

Codecov Report

Merging #18487 (e92ca7c) into main (499940a) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #18487      +/-   ##
==========================================
- Coverage   67.39%   67.36%   -0.04%     
==========================================
  Files         984      984              
  Lines      106980   106980              
  Branches     2670     2670              
==========================================
- Hits        72104    72070      -34     
- Misses      30992    31028      +36     
+ Partials     3884     3882       -2     

Flag	Coverage Δ
unittests	67.36% <100.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/jobservice/worker/cworker/reaper.go	43.77% <100.00%> (ø)

... and 5 files with indirect coverage changes

[wy65701436]

lgtm