docs(DCC-14): add changelog, contributing guide, and security policy #6

	name: CI

	on:
	push:
	branches: [main, master, develop]
	pull_request:
	branches: [main, master, develop]

	permissions:
	contents: read

	concurrency:
	group: ci-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	quality:
	name: Quality Gate (Node ${{ matrix.node-version }})
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	node-version: [22, 24]
	steps:
	- uses: actions/checkout@v4

	- name: Setup Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}
	cache: npm

	- name: Install dependencies
	run: npm ci

	- name: Formatting check
	run: npm run format:check

	- name: Lint
	run: npm run lint

	- name: Type check
	run: npm run typecheck

	- name: Test with coverage
	run: npm run test:coverage

	- name: Build
	run: npm run build

	- name: Validate package exports (publint)
	run: npm run check:publint

	- name: Validate type exports (attw)
	run: npm run check:exports

	- name: Check bundle size
	run: npm run check:size

	- name: Check package contents
	run: \|
	npm pack --dry-run 2>&1 \| tail -5
	echo "---"
	du -sh dist/

	- name: Upload coverage
	if: matrix.node-version == 24
	uses: actions/upload-artifact@v4
	with:
	name: coverage-report
	path: coverage/
	retention-days: 14

	release-dry-run:
	name: Release Dry Run
	runs-on: ubuntu-latest
	needs: quality
	if: github.ref == 'refs/heads/main' \|\| github.ref == 'refs/heads/master'
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with:
	node-version: 24
	cache: npm
	- run: npm ci
	- run: npm run build
	- run: npm pack --dry-run

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