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

[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 10, 2026, 7:00 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 (1739f29) to head (fc68beb).

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   59.00%   58.99%   -0.01%     
==========================================
  Files        2065     2065              
  Lines      169362   169349      -13     
==========================================
- Hits        99931    99914      -17     
+ Misses      60671    60666       -5     
- Partials     8760     8769       +9     

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%> (+1.46%)	⬆️

... and 36 files with indirect coverage changes

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