Update dependencies and CI/CD workflows

[cmackenzie1]

Summary

This PR updates the project's Rust version requirement, upgrades key dependencies, and modernizes the CI/CD workflows to use the latest versions of GitHub Actions.

Key Changes

• Rust version: Bumped minimum supported Rust version from 1.85 to 1.88
• Dependencies:
  • jsonwebtoken: Updated from v10 to v11
  • rand: Updated from v0.9.0 (with small_rng feature) to v0.10.2 (without feature specification)
• GitHub Actions:
  • actions/checkout: Updated from v6 to v7
  • codecov/codecov-action: Updated from v6 to v7

Notable Details

• The rand dependency update removes the explicit small_rng feature flag, suggesting the feature may no longer be necessary or has been integrated differently in v0.10.2
• All CI/CD workflow updates align with the latest stable versions of the respective GitHub Actions

https://claude.ai/code/session_01J3Fq8Sqsh832kWp2HBVmLh

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.09%. Comparing base (6a230a3) to head (a0cdd0f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #52   +/-   ##
=======================================
  Coverage   87.09%   87.09%           
=======================================
  Files           3        3           
  Lines         558      558           
=======================================
  Hits          486      486           
  Misses         72       72           

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