fix ss import for raw flatkv modules

[Kbhat1]

Describe your changes and provide context

• Update SS import to recognize raw FlatKV module names and decode those low-level values with vtype before routing them into the logical EVM state store

Testing performed to validate your change

• Unit tests
• State syncing fully on node

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Apr 13, 2026, 1:19 PM

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.99%. Comparing base (df8c2bb) to head (bf935f3).

Files with missing lines	Patch %	Lines
sei-db/state_db/ss/composite/store.go	80.45%	10 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3228      +/-   ##
==========================================
- Coverage   59.26%   58.99%   -0.27%     
==========================================
  Files        2066     2064       -2     
  Lines      169624   169322     -302     
==========================================
- Hits       100521    99895     -626     
- Misses      60311    60661     +350     
+ Partials     8792     8766      -26     

Flag	Coverage Δ
sei-chain-pr	74.52% <83.33%> (?)
sei-db	70.41% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
sei-db/common/evm/keys.go	93.54% <100.00%> (+2.05%)	⬆️
sei-db/state_db/ss/composite/store.go	71.90% <80.45%> (+0.14%)	⬆️

... and 46 files with indirect coverage changes

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