chore: update Rust toolchain to 1.94, bump dependencies and CI tools

[geeknoid]

Summary

Update the Rust toolchain to 1.94, bump all tool versions to their latest available releases, update all external dependency versions in Cargo.toml, and update GitHub Action versions.

Rust Toolchain

• RUST_LATEST: 1.93 -> 1.94

Cargo Tools (constants.env)

• cargo-hack 0.6.41 -> 0.6.43
• cargo-mutants 26.1.2 -> 26.2.0
• cargo-nextest 0.9.122 -> 0.9.130
• just 1.46.0 -> 1.47.1
• sccache v0.13.0 -> v0.14.0

External Dependencies (Cargo.toml)

35 dependency version bumps including tokio, hyper, http, syn, tracing, futures, derive_more, rapidhash, and more.

GitHub Actions

• actions-rust-lang/setup-rust-toolchain v1.15.2 -> v1.15.4
• taiki-e/install-action v2.65.1 -> v2.67.19
• davidlattimore/wild-action 0.7.0 -> 0.8.0
• marocchino/sticky-pull-request-comment v2.9.4 -> v3.0.2
• codecov/codecov-action v5.5.2 -> v5.5.3

Other

• Fixed stale RUST_LATEST comment in constants.env (removed invalid rust-toolchain.toml reference, corrected usage description)
• cargo-spellcheck kept at 0.15.1 (latest version doesn't work)

[Copilot]

Pull request overview

This PR updates the repository’s pinned Rust toolchain versions, bumps a set of CI/automation tool versions, refreshes workspace dependency versions, and updates several GitHub Action pins to newer releases.

Changes:

• Bump pinned Rust versions in constants.env (stable and nightly).
• Update [workspace.dependencies] versions in Cargo.toml and refresh Cargo.lock accordingly.
• Update several GitHub Actions version pins in CI workflow and the shared setup composite action.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
constants.env	Updates pinned Rust toolchain + selected cargo/CI tool versions.
Cargo.toml	Bumps many workspace dependency versions.
Cargo.lock	Refreshes lockfile to match updated dependency set.
.github/workflows/main.yml	Updates action versions for sticky PR comments and Codecov upload.
.github/actions/setup/action.yml	Updates action versions for Rust/tool installation and wild linker.

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[Copilot]

Pull request overview

Copilot reviewed 32 out of 33 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

constants.env:31

• PR description claims cargo-spellcheck is bumped to 0.15.5, but CARGO_SPELLCHECK_VERSION remains 0.15.1. If the goal is to bump all pinned CI tools, update this value (and keep the PR description/table consistent).

CARGO_SORT_VERSION=2.0.2
CARGO_SPELLCHECK_VERSION=0.15.1
CARGO_UDEPS_VERSION=0.1.60

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (9377895) to head (9770e87).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #337   +/-   ##
=======================================
  Coverage   100.0%   100.0%           
=======================================
  Files         207      207           
  Lines       15403    15403           
=======================================
  Hits        15403    15403           

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