Composite State Store Part 5: WAL integration + Composite Pruning Manager

[Kbhat1]

Describe your changes and provide context

• Add RecoverCompositeStateStore to handle WAL replay for both stores on startup
• Refactor pruning to go through CompositeStateStore so both Cosmos_SS and EVM_SS are pruned correctly
• If EVM_SS is behind (e.g., newly enabled or crash), sync it from WAL before standard recovery
• Standard WAL replay uses ApplyChangesetSync which dual-writes to both stores automatically
• Backward search for replay offset matches existing RecoverStateStore pattern
• Both stores stay consistent after crashes/restarts

Testing performed to validate your change

• Unit tests
• Verifying 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	Jan 30, 2026, 5:31 AM

[codecov]

Codecov Report

❌ Patch coverage is 59.80392% with 41 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.84%. Comparing base (9be2e36) to head (d0ff8d9).

Files with missing lines	Patch %	Lines
sei-db/state_db/ss/composite/store.go	59.80%	22 Missing and 19 partials ⚠️

Additional details and impacted files

@@                         Coverage Diff                         @@
##           feature/composite-ss-write-path    #2785      +/-   ##
===================================================================
+ Coverage                            41.85%   43.84%   +1.98%     
===================================================================
  Files                                 1022     1996     +974     
  Lines                                84784   164265   +79481     
===================================================================
+ Hits                                 35490    72018   +36528     
- Misses                               45949    85655   +39706     
- Partials                              3345     6592    +3247     

Flag	Coverage Δ
sei-chain	45.95% <59.80%> (?)
sei-cosmos	37.72% <ø> (-0.02%)	⬇️
sei-db	68.72% <ø> (ø)
sei-tendermint	47.53% <ø> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
sei-db/state_db/ss/composite/store.go	41.39% <59.80%> (ø)

... and 990 files with indirect coverage changes

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