Move sei-iavl into sei-chain mono repo

[masih]

The sei-iavl fork has a direct dependency to the original tendermint module. This blocks the go mod flattening effort in sei-chain, because flattening sei-tendermint will otherwise leave behind transient dependency to the original tendermint module in the go module dependency tree.

The work here:

• moves the current head of sei-iavl into sei-chain, i.e. commit ff17b3473ee2438caa1777930a0bf73d267527fa.
  • This is the latest tagged release of that repo, v0.2.0.
  • ...and consistent with the dependency version at the current head of main.
• Adjusts proto generation as needed, and removes redundant duplicate protos.
  • Note that the existing pb.go files in sei-iavl were out of date and are re-generated.
• Directly flattens sei-iavl module into sei-chain while at it.
• Preserves the original commit history from sei-iavl, which requires rebase-merge as opposed to the usual squash merge.

Upon the merge of this PR, sei-iavl repo should be archived.

[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	Dec 17, 2025, 4:39 PM

[codecov]

Codecov Report

❌ Patch coverage is 59.87385% with 1654 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.62%. Comparing base (10539a2) to head (665a792).
⚠️ Report is 69 commits behind head on main.

Files with missing lines	Patch %	Lines
sei-iavl/mutable_tree.go	66.90%	154 Missing and 119 partials ⚠️
sei-iavl/nodedb.go	60.48%	151 Missing and 96 partials ⚠️
sei-iavl/mock/db_mock.go	0.00%	213 Missing ⚠️
sei-iavl/cmd/iaviewer/main.go	0.00%	141 Missing ⚠️
sei-iavl/benchmarks/cosmos-exim/main.go	0.00%	115 Missing ⚠️
sei-iavl/node.go	73.65%	62 Missing and 46 partials ⚠️
sei-iavl/immutable_tree.go	52.31%	62 Missing and 10 partials ⚠️
sei-iavl/internal/rand/random.go	55.46%	56 Missing and 1 partial ⚠️
sei-iavl/internal/encoding/encoding.go	26.66%	54 Missing and 1 partial ⚠️
sei-iavl/proof_range.go	83.38%	29 Missing and 21 partials ⚠️
... and 18 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2624      +/-   ##
==========================================
+ Coverage   43.15%   43.62%   +0.46%     
==========================================
  Files        1867     1899      +32     
  Lines      154112   158389    +4277     
==========================================
+ Hits        66509    69090    +2581     
- Misses      81637    82954    +1317     
- Partials     5966     6345     +379     

Flag	Coverage Δ
sei-chain	45.52% <59.87%> (+0.91%)	⬆️
sei-cosmos	38.03% <ø> (+<0.01%)	⬆️
sei-db	69.06% <ø> (ø)
sei-tendermint	47.50% <ø> (-0.01%)	⬇️

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

Files with missing lines	Coverage Δ
cmd/seid/cmd/debug.go	0.00% <ø> (ø)
sei-cosmos/store/iavl/store.go	58.11% <ø> (ø)
sei-cosmos/store/iavl/tree.go	65.62% <ø> (ø)
sei-cosmos/store/rootmulti/store.go	69.48% <ø> (ø)
sei-cosmos/storev2/commitment/store.go	9.37% <ø> (ø)
sei-db/sc/memiavl/db.go	63.14% <ø> (ø)
sei-db/sc/memiavl/multitree.go	79.55% <ø> (ø)
sei-db/sc/memiavl/proof.go	90.17% <ø> (ø)
sei-db/sc/memiavl/tree.go	79.38% <ø> (ø)
sei-db/ss/test/storage_bench_suite.go	0.00% <ø> (ø)
... and 41 more

... and 13 files with indirect coverage changes

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[github-advanced-security]

CodeQL found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.