feat: throw error if incorrect sequenceLength

[rootulp]

Closes #839

[codecov-commenter]

Codecov Report

Merging #865 (3bb4e5a) into main (3598fe2) will increase coverage by 0.32%.
The diff coverage is 72.58%.

@@            Coverage Diff             @@
##             main     #865      +/-   ##
==========================================
+ Coverage   25.82%   26.15%   +0.32%     
==========================================
  Files          75       75              
  Lines        9296     9344      +48     
==========================================
+ Hits         2401     2444      +43     
+ Misses       6675     6674       -1     
- Partials      220      226       +6     

Impacted Files	Coverage Δ
pkg/shares/parse_sparse_shares.go	77.77% <0.00%> (ø)
pkg/shares/split_sparse_shares.go	67.96% <0.00%> (ø)
pkg/shares/shares.go	68.29% <20.00%> (+13.29%)	⬆️
pkg/shares/share_merging.go	76.50% <79.16%> (+0.87%)	⬆️
pkg/shares/info_byte.go	100.00% <100.00%> (ø)
pkg/shares/parse_compact_shares.go	66.66% <100.00%> (ø)

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[evan-forbes]

[comment]
switching from message to sequence is good and makes more sense for universal shares imo

had a few preliminary questions even tho this is still a draft. so far LGTM!