flatkv migration testings test

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[cursor]

PR Summary

High Risk
High risk because it rewires CompositeCommitStore initialization/routing and removes ReadMode/EnableLatticeHash, affecting consensus AppHash behavior and state migration paths. Also adds new CI/docker workflows and migration scripts that can change how integration tests and devnets boot and migrate state.

Overview
Updates FlatKV/state-commit configuration to remove sc-read-mode and sc-enable-lattice-hash and introduce sc-keys-to-migrate-per-block, with stricter validation and safer defaults (including early parsing/validation of sc-write-mode).

Refactors sei-db CompositeCommitStore to build all reads/writes/proofs/iterators through the migration Router, make construction/initialization error-returning, handle memiavl/flatkv presence per write-mode, and append the FlatKV lattice hash to CommitInfo based on migration state rather than a config flag.

Expands migration and recovery coverage: adds comprehensive Go tests for MemiavlOnly -> migrate_evm -> evm_migrated, adds a new docker-level FlatKV EVM Migration 0->1 integration job plus a coordinated cutover script, and simplifies existing FlatKV CI scenarios to run with FlatKV enabled from genesis (GIGA_STORAGE=true using test_only_dual_write) while removing the old offline import workflow.

^{Reviewed by Cursor Bugbot for commit b3b6cc2. Bugbot is set up for automated code reviews on this repo. Configure here.}

[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	May 20, 2026, 3:41 PM

[codecov]

Codecov Report

❌ Patch coverage is 62.65487% with 211 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.05%. Comparing base (1dd16d0) to head (b3b6cc2).

Files with missing lines	Patch %	Lines
sei-db/state_db/sc/composite/store.go	70.60%	50 Missing and 37 partials ⚠️
...b/tools/cmd/seidb/operations/migrate_evm_status.go	0.00%	55 Missing ⚠️
scripts/evm_stress/main.go	0.00%	28 Missing ⚠️
sei-db/state_db/sc/flatkv/store_meta.go	61.90%	14 Missing and 10 partials ⚠️
sei-db/state_db/sc/migration/migration_manager.go	92.50%	3 Missing and 3 partials ⚠️
sei-cosmos/storev2/rootmulti/store.go	20.00%	2 Missing and 2 partials ⚠️
app/seidb.go	0.00%	2 Missing and 1 partial ⚠️
sei-db/config/sc_config.go	50.00%	1 Missing and 1 partial ⚠️
sei-db/tools/cmd/seidb/main.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #3462    +/-   ##
========================================
  Coverage   59.04%   59.05%            
========================================
  Files        2188     2189     +1     
  Lines      182088   182455   +367     
========================================
+ Hits       107517   107750   +233     
- Misses      64933    65040   +107     
- Partials     9638     9665    +27     

Flag	Coverage Δ
sei-chain-pr	64.94% <62.65%> (?)
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-cosmos/server/config/config.go	94.53% <100.00%> (+0.12%)	⬆️
sei-db/config/write_mode.go	100.00% <100.00%> (ø)
sei-db/state_db/sc/memiavl/store.go	92.59% <100.00%> (-0.06%)	⬇️
sei-db/state_db/sc/migration/router_builder.go	56.72% <100.00%> (+4.40%)	⬆️
sei-db/config/sc_config.go	87.50% <50.00%> (-12.50%)	⬇️
sei-db/tools/cmd/seidb/main.go	0.00% <0.00%> (ø)
app/seidb.go	73.61% <0.00%> (+1.61%)	⬆️
sei-cosmos/storev2/rootmulti/store.go	64.30% <20.00%> (-0.50%)	⬇️
sei-db/state_db/sc/migration/migration_manager.go	94.19% <92.50%> (-1.29%)	⬇️
sei-db/state_db/sc/flatkv/store_meta.go	67.71% <61.90%> (-5.73%)	⬇️
... and 3 more

... and 33 files with indirect coverage changes

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Wire the migration batch size into app config

Adding this field does not make it configurable at runtime: the generated app.toml template has no matching key and app/seidb.go only reads the existing FlagSC* options, while the new migration script writes keys-to-migrate-per-block expecting it to take effect. As a result, migrate_* runs configured from app.toml keep using the hard-coded default (and server/config.GetConfig leaves the field at zero in its literal), so operators/tests cannot throttle batches and the 0->1 test silently skips the intended small-batch resume coverage. Please add the TOML key/flag and parse it into StateCommitConfig.

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 2 total unresolved issues (including 1 from previous review).

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^{Reviewed by Cursor Bugbot for commit ad6ce4a. Configure here.}