Apply comprehensive Rust lint fixes

[octoaide]

This PR contains comprehensive Rust lint fixes applied automatically by Octoaide.

Changes

• Applied cargo clippy --fix for automatic lint corrections
• Resolved additional lint issues with iterative AI-powered fixing
• Applied cargo fmt as final formatting step

Testing

• cargo test passes locally
• cargo clippy checks pass with no warnings
• cargo fmt formatting verified
• All fixes validated before creating this PR

This PR is ready for review and can be safely merged once CI passes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.90%. Comparing base (ddda2af) to head (29011ed).

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #683    +/-   ##
========================================
  Coverage   80.90%   80.90%            
========================================
  Files          83       83            
  Lines       23358    23217   -141     
========================================
- Hits        18897    18784   -113     
+ Misses       4461     4433    -28     

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[msk]

Invalid PR.