(#3210) Add buffering around dataset auto-shrinking

[squaregoldfish]

Fix #3210

[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 31.38%. Comparing base (a74e8e8) to head (1876be2).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ac/exeter/QuinCe/jobs/files/ExtractDataSetJob.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3211      +/-   ##
============================================
+ Coverage     31.35%   31.38%   +0.03%     
- Complexity     2256     2258       +2     
============================================
  Files           404      406       +2     
  Lines         21453    21461       +8     
  Branches       2911     2909       -2     
============================================
+ Hits           6726     6736      +10     
  Misses        14249    14249              
+ Partials        478      476       -2     

Flag	Coverage Δ
unittests	31.38% <90.00%> (+0.03%)	⬆️

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