Backport release/v6.4: fix(evmrpc): return empty array instead of null for eth_getFilterLogs and eth_getFilterChanges

[seidroid]

Backport of #3292 to release/v6.4.

[seidroid]

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-3292-to-release/v6.4
git worktree add --checkout .worktree/backport-3292-to-release/v6.4 backport-3292-to-release/v6.4
cd .worktree/backport-3292-to-release/v6.4
git reset --hard HEAD^
git cherry-pick -x 0ad5733844536ef11c057e5624bb3e949c99cb9a
git push --force-with-lease

[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 28, 2026, 5:10 PM

[codecov]

Codecov Report

❌ Patch coverage is 13.33333% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.36%. Comparing base (ffb1523) to head (95f0c18).

Files with missing lines	Patch %	Lines
evmrpc/filter.go	18.18%	7 Missing and 2 partials ⚠️
evmrpc/rpc_unsupported.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v6.4    #3324      +/-   ##
================================================
- Coverage         58.36%   58.36%   -0.01%     
================================================
  Files              2091     2092       +1     
  Lines            173022   173034      +12     
================================================
+ Hits             100983   100988       +5     
- Misses            63045    63052       +7     
  Partials           8994     8994              

Flag	Coverage Δ
sei-chain-pr	63.23% <13.33%> (?)
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
evmrpc/rpc_unsupported.go	0.00% <0.00%> (ø)
evmrpc/filter.go	69.44% <18.18%> (-0.09%)	⬇️

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