Add staking queries and distr events to precompiles

[codchen]

Describe your changes and provide context

• Add queries in the staking precompile for all Cosmos querier counterparts
• Add events for all methods in the distribution precompile

Testing performed to validate your change

unit tests

[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 23, 2025, 4:09 PM

[codecov]

Codecov Report

❌ Patch coverage is 74.17103% with 148 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.71%. Comparing base (9f19942) to head (09e3088).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
precompiles/staking/staking.go	76.06%	73 Missing and 51 partials ⚠️
precompiles/distribution/distribution.go	55.55%	16 Missing and 8 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2623      +/-   ##
==========================================
+ Coverage   43.62%   43.71%   +0.09%     
==========================================
  Files        1899     1899              
  Lines      158402   158894     +492     
==========================================
+ Hits        69096    69456     +360     
- Misses      82966    83030      +64     
- Partials     6340     6408      +68     

Flag	Coverage Δ
sei-chain	45.70% <74.12%> (+0.19%)	⬆️
sei-cosmos	38.03% <100.00%> (-0.01%)	⬇️
sei-db	69.06% <ø> (ø)
sei-tendermint	47.52% <ø> (-0.02%)	⬇️

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

Files with missing lines	Coverage Δ
precompiles/utils/expected_keepers.go	0.00% <ø> (ø)
sei-cosmos/x/staking/keeper/grpc_query.go	64.53% <100.00%> (+0.11%)	⬆️
precompiles/distribution/distribution.go	75.67% <55.55%> (-6.27%)	⬇️
precompiles/staking/staking.go	77.73% <76.06%> (-0.48%)	⬇️

... and 15 files with indirect coverage changes

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[philipsu522]

/backport

[github-actions]

Successfully created backport PR for release/v6.3:

• Backport release/v6.3: Add staking queries and distr events to precompiles #2643