chore: reformat tree with cargo fmt and add fmt to CI gate (#13) #8

	# PR / push CI for lightweight quality gates. Builds and tests are covered by
	# release.yml (signed artifacts) and pipeline-parallel-ci.yml (distributed
	# runs); this workflow runs cargo-deny (license / advisory) and cargo-fmt
	# checks on every touched-Rust change so formatting drift and license issues
	# are caught at PR time.

	name: CI

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	permissions:
	contents: read

	jobs:
	changes:
	name: Detect changes
	runs-on: ubuntu-latest
	permissions:
	contents: read
	pull-requests: read
	outputs:
	rust: ${{ steps.filter.outputs.rust }}
	steps:
	- uses: actions/checkout@v6
	with:
	persist-credentials: false
	- uses: dorny/paths-filter@v4
	id: filter
	with:
	filters: \|
	rust:
	- '*/.rs'
	- '**/Cargo.toml'
	- 'Cargo.lock'
	- 'deny.toml'
	- '.github/workflows/ci.yml'

	deny:
	name: cargo-deny
	needs: changes
	if: needs.changes.outputs.rust == 'true'
	runs-on: ubuntu-latest
	permissions:
	contents: read
	steps:
	- uses: actions/checkout@v6
	with:
	persist-credentials: false
	- uses: EmbarkStudios/cargo-deny-action@v2
	with:
	command: check
	log-level: warn

	fmt:
	name: cargo-fmt
	needs: changes
	if: needs.changes.outputs.rust == 'true'
	runs-on: ubuntu-latest
	permissions:
	contents: read
	steps:
	- uses: actions/checkout@v6
	with:
	persist-credentials: false
	- uses: dtolnay/rust-toolchain@stable
	with:
	components: rustfmt
	- run: cargo fmt --all -- --check

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