chore: fix rustfmt drift on v4.2-dev

[QuantumExplorer]

Issue being fixed or feature implemented

cargo fmt --check --all fails on the current v4.2-dev head (verified on a clean checkout of 7afc8a8ff3) with three diffs in packages/rs-platform-wallet-ffi/src/dashpay.rs and packages/rs-sdk-ffi/src/signer.rs, introduced by recently merged kotlin-sdk FFI PRs. Since CI builds each PR's merge ref against the branch head, the Rust workspace tests / Tests (macOS) formatting step currently fails for every open PR targeting v4.2-dev (e.g. it just failed on #4276, which touches neither file).

What was done?

cargo fmt -p rs-sdk-ffi -p platform-wallet-ffi — the tool's own output, nothing else. cargo fmt --all --check is clean afterwards.

How Has This Been Tested?

Formatting-only change; cargo fmt --all --check passes on the branch.

Breaking Changes

None.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

🤖 Generated with Claude Code

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Review details

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Run ID: 56021ea2-fba8-4dd2-8389-ea8309d085dd

📥 Commits

Reviewing files that changed from the base of the PR and between 7afc8a8 and 0a57fc1.

📒 Files selected for processing (2)

• packages/rs-platform-wallet-ffi/src/dashpay.rs
• packages/rs-sdk-ffi/src/signer.rs

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[thepastaclaw]

ℹ️ Review skipped (commit 0a57fc1)
Last checked: 2026-08-04 06:01 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.52%. Comparing base (189a3ab) to head (0a57fc1).
⚠️ Report is 3 commits behind head on v4.2-dev.

Additional details and impacted files

@@             Coverage Diff              @@
##           v4.2-dev    #4278      +/-   ##
============================================
- Coverage     87.53%   87.52%   -0.01%     
============================================
  Files          2678     2678              
  Lines        343721   341047    -2674     
============================================
- Hits         300888   298518    -2370     
+ Misses        42833    42529     -304     

Components	Coverage Δ
dpp	88.49% <ø> (-0.08%)	⬇️
drive	86.26% <ø> (+0.08%)	⬆️
drive-abci	89.57% <ø> (-0.10%)	⬇️
sdk	∅ <ø> (∅)
dapi-client	∅ <ø> (∅)
platform-version	∅ <ø> (∅)
platform-value	92.88% <ø> (ø)
platform-wallet	∅ <ø> (∅)
drive-proof-verifier	49.60% <ø> (ø)

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