[ci] Roll pinned nightly toolchain

[google-pr-creation-bot]

On failure, consider manually creating roll PRs for previous nightlies to bisect the failure.

[gemini-code-assist]

Summary of Changes

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This pull request performs a routine update of the pinned nightly Rust toolchain version used in the project's continuous integration setup. This is a standard maintenance task to keep the project aligned with the latest compiler developments, ensuring compatibility and early detection of any regressions introduced by newer nightly builds.

Highlights

• CI Toolchain Update: The pinned-nightly Rust toolchain version in Cargo.toml has been updated from nightly-2026-01-25 to nightly-2026-02-02. This ensures the project's continuous integration environment uses a more recent nightly build of the Rust compiler.

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Changelog

• Cargo.toml
  • Updated the pinned-nightly toolchain version from nightly-2026-01-25 to nightly-2026-02-02.

Activity

• No human activity has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request updates the pinned nightly toolchain version in Cargo.toml. This appears to be a routine, automated update for the CI configuration. The change is straightforward and I have no issues to report.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.02%. Comparing base (78088c4) to head (d23e37e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2976   +/-   ##
=======================================
  Coverage   92.02%   92.02%           
=======================================
  Files          19       19           
  Lines        6029     6029           
=======================================
  Hits         5548     5548           
  Misses        481      481           

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