perf: fix /perf-test CI job

[rh-jfuller]

Summary by Sourcery

CI:

• Switch perf-test workflow from a local Rust setup action to actions-rust-lang/setup-rust-toolchain@v1 with Rust toolchain 1.96.0 and caching disabled.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Replaces the custom local Rust setup action in the perf-test workflow with the standard actions-rust-lang/setup-rust-toolchain action pinned to Rust 1.96.0 and disables its cache, keeping the existing Swatinem/rust-cache usage.

File-Level Changes

Change	Details	Files
Switch perf-test CI job to use the official Rust toolchain setup action instead of the local setup-rust composite action.	Replace ./.github/actions/setup-rust with actions-rust-lang/setup-rust-toolchain@v1 in the perf-test GitHub Actions workflow Configure the Rust toolchain version explicitly to 1.96.0 for the perf-test job Disable the setup-rust-toolchain built-in cache to avoid conflicts with the existing Swatinem/rust-cache@v2	.github/workflows/perf-test.yaml

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider aligning the specified toolchain: 1.96.0 with whatever is defined in your rust-toolchain.toml (or central Rust version config) to avoid divergence between CI and local development environments.
• Since cache: false disables the built-in caching in setup-rust-toolchain, double-check that Swatinem/rust-cache@v2 fully covers your caching needs and that the ordering between the two actions is intentional to avoid redundant downloads.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider aligning the specified `toolchain: 1.96.0` with whatever is defined in your `rust-toolchain.toml` (or central Rust version config) to avoid divergence between CI and local development environments.
- Since `cache: false` disables the built-in caching in `setup-rust-toolchain`, double-check that `Swatinem/rust-cache@v2` fully covers your caching needs and that the ordering between the two actions is intentional to avoid redundant downloads.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.53%. Comparing base (d9bf2e6) to head (3e6acb6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2448      +/-   ##
==========================================
+ Coverage   71.51%   71.53%   +0.01%     
==========================================
  Files         453      453              
  Lines       27360    27360              
  Branches    27360    27360              
==========================================
+ Hits        19567    19571       +4     
+ Misses       6671     6661      -10     
- Partials     1122     1128       +6     

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