refactor(store): write actual share size to ods

[walldiss]

We used to write const for share size in file header. Instead we can write actual size from provided eds.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.06%. Comparing base (2469e7a) to head (bc38562).
Report is 349 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3863      +/-   ##
==========================================
+ Coverage   44.83%   45.06%   +0.23%     
==========================================
  Files         265      314      +49     
  Lines       14620    21802    +7182     
==========================================
+ Hits         6555     9826    +3271     
- Misses       7313    10954    +3641     
- Partials      752     1022     +270     

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