feat(types): enhance type definitions with explicit null handling #2

	name: CI

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

	jobs:
	test:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	security-events: write
	attestations: write
	id-token: write

	strategy:
	matrix:
	node-version: [18.x, 20.x, 22.x]

	steps:
	- name: Checkout repository
	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: Run security audit
	run: npm audit --audit-level=high

	- name: Run lint
	run: npm run lint

	- name: Run type check
	run: npm run typecheck

	- name: Run tests
	run: npm run test:run

	- name: Build
	run: npm run build

	- name: Upload coverage reports
	if: matrix.node-version == '20.x'
	uses: codecov/codecov-action@v4
	with:
	fail_ci_if_error: true

	# Generate SBOM and build attestation only for Node.js 20.x
	- name: Generate SBOM
	if: matrix.node-version == '20.x'
	uses: anchore/sbom-action@v0
	with:
	path: .
	format: spdx-json

	- name: Submit dependency snapshot
	if: matrix.node-version == '20.x'
	uses: actions/dependency-review-action@v4

	- name: Create npm package
	if: matrix.node-version == '20.x'
	run: npm pack

	- name: Attest build provenance
	if: matrix.node-version == '20.x'
	uses: actions/attest-build-provenance@v1
	with:
	subject-path: \|
	dist/*/
	*.tgz

	- name: Upload build artifacts
	if: matrix.node-version == '20.x'
	uses: actions/upload-artifact@v4
	with:
	name: build-artifacts
	path: \|
	dist/
	*.tgz
	*.sbom.spdx.json

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