fix(acct-types): use digest Output alias

[peter941221]

Description

Replaces digest::generic_array::GenericArray with digest::Output in crates/acct-types/src/util.rs.

The old import path is deprecated in the current digest stack, and in this workspace's SP1 guest toolchain that warning was enough to trigger an ICE during release prover-perf guest builds. This keeps the helper behavior the same while moving to the public alias.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature/Enhancement (non-breaking change which adds functionality or enhances an existing one)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactor
• New or updated tests
• Dependency Update

Notes to Reviewers

This is intentionally split out of #1868 so the checkpoint fixture PR stays about benchmark realism rather than guest toolchain compatibility.

The diff is a type-alias substitution only. compute_codec_digest and compute_codec_sha256 keep the same behavior.

AI was used to assist in this PR.

Is this PR addressing any specification, design doc or external reference document?

• Yes
• No

If yes, please add relevant links:

Checklist

• I have performed a self-review of my code.
• I have commented my code where necessary.
• I have updated the documentation if needed.
• My changes do not introduce new warnings.
• I have added (where necessary) tests that prove my changes are effective or that my feature works.
• New and existing tests pass with my changes.
• I have disclosed my use of AI in the body of this PR.

Related Issues

[delbonis]

Amazing, thank you.

[bewakes]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 🎉

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.07%. Comparing base (3524605) to head (94eac4c).
⚠️ Report is 15 commits behind head on main.

@@            Coverage Diff             @@
##             main    #1872      +/-   ##
==========================================
+ Coverage   80.05%   80.07%   +0.01%     
==========================================
  Files         685      685              
  Lines       77937    77937              
==========================================
+ Hits        62391    62406      +15     
+ Misses      15546    15531      -15     

Flag	Coverage Δ
functional	59.59% <0.00%> (+0.35%)	⬆️
unit	66.05% <100.00%> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
crates/acct-types/src/util.rs	100.00% <100.00%> (ø)

... and 31 files with indirect coverage changes

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[storopoli]

@peter941221 CI is failing you need to format your code.

[peter941221]

Pushed 21e45bd to fix the formatting failure in crates/acct-types/src/util.rs.\n\nI reran cargo fmt --all --check on the PR branch in WSL, and it passes now. I also reran cargo test -p strata-acct-types --lib -- --nocapture in a Linux-side WSL copy because this repo's SSZ build inputs still hit the known CRLF trap from /mnt/c checkouts, and that package test passed there.