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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[martintmk]

Do we really need to bumb this many dependencies? This causes chain reaction where we need to go through each crate and bump minor version. Pending PRs, that are adding small feature now have to wait until all new packages are released.

In Rust community there is a common pattern where a crate dependencies are actually at a minimum version required. For example, crate does not depend on http at version 1.3.43 but rather 1.0.0 because it does not use features of latter version.