build(dep): rand 0.10 + MSRV 1.85 + Edition 2024

[tisonkun]

No description provided.

[Copilot]

Pull request overview

Updates the workspace’s Rust baseline and dependency set to support rand 0.10, aligning tooling, CI, and documentation with the new MSRV and edition.

Changes:

• Bump MSRV/toolchain/CI from Rust 1.80.0 to 1.85.0.
• Switch workspace edition to Rust 2024 and document the upgrade.
• Update dependencies (notably rand to 0.10.0; plus flume/mockall) and adjust rustdoc examples/README accordingly.

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
rust-toolchain.toml	Pins toolchain to Rust 1.85.0.
Cargo.toml	Updates workspace edition to 2024 and rust-version to 1.85.0.
.github/workflows/ci.yml	Updates MSRV CI lane to Rust 1.85.0.
fastrace/Cargo.toml	Bumps rand to 0.10.0 and updates some dev-dependencies.
fastrace/src/macros.rs	Adjusts rustdoc examples for func_path!() / file_location!().
README.md	Updates MSRV badge and supported versions section to 1.85.0.
CHANGELOG.md	Notes MSRV + edition upgrade in Unreleased.
Cargo.lock	Refreshes lockfile for updated dependency graph.

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[tisonkun]

@andylokandy I'm going to merge this and cut a release.