fix(broker): replace blocking stdout writer task with tokio::io #522

	name: Rust Auto-Format

	on:
	push:
	branches: [main]
	paths:
	- '**.rs'
	- 'Cargo.toml'
	- 'Cargo.lock'
	pull_request:
	paths:
	- '**.rs'
	- 'Cargo.toml'
	- 'Cargo.lock'

	jobs:
	format:
	name: Auto-format Rust code
	runs-on: ubuntu-latest
	# Only run on same-repo PRs where the bot can push back formatting commits.
	if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
	permissions:
	contents: write
	steps:
	- uses: actions/checkout@v4
	with:
	ref: ${{ github.head_ref }}
	token: ${{ secrets.GITHUB_TOKEN }}

	- uses: dtolnay/rust-toolchain@stable
	with:
	components: rustfmt

	- name: Run cargo fmt
	run: cargo fmt --all

	- name: Check for changes
	id: changes
	run: \|
	if git diff --quiet; then
	echo "changed=false" >> $GITHUB_OUTPUT
	else
	echo "changed=true" >> $GITHUB_OUTPUT
	fi

	- name: Commit formatting changes
	if: steps.changes.outputs.changed == 'true'
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "github-actions[bot]@users.noreply.github.com"
	git add -A
	git commit -m "style: auto-format Rust code with cargo fmt"
	git push

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