fixed ibc.lightclients.solomachine.v2.ClientState decoding (CON-259)

[pompon0]

the panic on bad input was problematic, see https://linear.app/seilabs/issue/CON-259

[github-actions]

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Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Apr 28, 2026, 4:18 PM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.17%. Comparing base (33099c0) to head (0e9dcf0).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3329      +/-   ##
==========================================
- Coverage   59.17%   59.17%   -0.01%     
==========================================
  Files        2097     2097              
  Lines      172488   172273     -215     
==========================================
- Hits       102078   101947     -131     
+ Misses      61557    61487      -70     
+ Partials     8853     8839      -14     

Flag	Coverage Δ
sei-chain-pr	81.64% <100.00%> (?)
sei-db	70.41% <ø> (ø)

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Files with missing lines	Coverage Δ
.../light-clients/06-solomachine/types/solomachine.go	100.00% <100.00%> (ø)

... and 47 files with indirect coverage changes

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