Short circuit sealing a sealed shard. Test as well.

[szmyd]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 66.66% and project coverage change: -1.00% ⚠️

Comparison is base (951d61d) 82.04% compared to head (80e21a5) 81.04%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
- Coverage   82.04%   81.04%   -1.00%     
==========================================
  Files          16       16              
  Lines         245      248       +3     
  Branches       25       26       +1     
==========================================
  Hits          201      201              
- Misses         28       31       +3     
  Partials       16       16              

Files Changed	Coverage Δ
src/lib/memory/shard_manager.cpp	80.00% <0.00%> (ø)
src/lib/shard_manager.cpp	87.09% <80.00%> (-2.19%)	⬇️

... and 1 file with indirect coverage changes

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[zichanglai]

lgtm