fix(worker): Increase incremental schedule to limit duplicate checksum effort

[nellh]

Raise the checksum incremental time to reduce time spent repeating checksums.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.01%. Comparing base (871f977) to head (81b90bf).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3655   +/-   ##
=======================================
  Coverage   43.01%   43.01%           
=======================================
  Files         636      636           
  Lines       33887    33887           
  Branches     1515     1515           
=======================================
  Hits        14577    14577           
  Misses      19171    19171           
  Partials      139      139           

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