Avoid to panic when recoverying WAL segments

[nakabonne]

This PR addresses #37 (comment)

[codecov-commenter]

Codecov Report

Merging #41 (db5fa68) into main (f3d4970) will decrease coverage by 0.12%.
The diff coverage is 33.34%.

@@            Coverage Diff             @@
##             main      #41      +/-   ##
==========================================
- Coverage   62.26%   62.15%   -0.11%     
==========================================
  Files          19       19              
  Lines        1126     1128       +2     
==========================================
  Hits          701      701              
- Misses        293      294       +1     
- Partials      132      133       +1     

Impacted Files	Coverage Δ
partition_list.go	81.19% <0.00%> (-1.64%)	⬇️
storage.go	51.38% <100.00%> (ø)

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