Backport release/v6.4: Disable zero copy for SC

[seidroid]

Backport of #3107 to release/v6.4.

[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	Mar 23, 2026, 12:30 PM

[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	Mar 21, 2026, 8:49 PM

[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	Mar 21, 2026, 8:50 PM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.39%. Comparing base (0318a62) to head (1f5d94e).
⚠️ Report is 1 commits behind head on release/v6.4.

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v6.4    #3108      +/-   ##
================================================
- Coverage         58.39%   58.39%   -0.01%     
================================================
  Files              2088     2088              
  Lines            172135   172130       -5     
================================================
- Hits             100525   100520       -5     
  Misses            62647    62647              
  Partials           8963     8963              

Flag	Coverage Δ
sei-chain-pr	68.03% <100.00%> (?)
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/storev2/rootmulti/store.go	46.49% <ø> (-0.48%)	⬇️
sei-db/state_db/sc/memiavl/store.go	90.12% <100.00%> (ø)

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