redactor 0.3.0

Secure PDF redaction library with Type3 font support using MuPDF
Documentation 
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name: Mutation Testing

on:
  # Weekly scheduled run (Sunday at 2 AM UTC)
  schedule:
    - cron: '0 2 * * 0'

  # Manual trigger via GitHub Actions UI
  workflow_dispatch:

  # Optional: Run on pushes to main (uncomment if desired)
  # push:
  #   branches: [ "main" ]

env:
  CARGO_TERM_COLOR: always

jobs:
  mutation-testing:
    name: Mutation Testing
    runs-on: ubuntu-latest
    timeout-minutes: 60  # Mutation testing can take 15-30 minutes

    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable

    - name: Install system dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y \
          libfontconfig1-dev \
          libfreetype6-dev \
          libharfbuzz-dev \
          libgraphite2-dev \
          libjpeg-dev \
          libopenjp2-7-dev \
          libssl-dev \
          pkg-config

    - name: Cache cargo registry and target
      uses: actions/cache@v4
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          target
        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
        restore-keys: |
          ${{ runner.os }}-cargo-

    - name: Install cargo-mutants
      run: cargo install cargo-mutants

    - name: Run mutation testing
      run: cargo mutants --all --html
      continue-on-error: true  # Don't fail CI if mutation score is low

    - name: Upload mutation testing report
      uses: actions/upload-artifact@v4
      if: always()
      with:
        name: mutation-testing-report
        path: |
          mutants-out/html/
          mutants-out/*.json
        retention-days: 30

    - name: Extract mutation score
      id: mutation_score
      if: always()
      run: |
        # Extract mutation score from cargo-mutants output
        # Format: "Mutation score: 85.0% (125/147)"
        if [ -f mutants-out/results.json ]; then
          # Parse JSON if available
          echo "mutation_score=$(jq -r '.summary.mutation_score // "N/A"' mutants-out/results.json 2>/dev/null || echo "N/A")" >> $GITHUB_OUTPUT
        else
          echo "mutation_score=N/A" >> $GITHUB_OUTPUT
        fi

    - name: Comment mutation score summary
      if: github.event_name == 'pull_request' && always()
      uses: actions/github-script@v7
      with:
        script: |
          const score = '${{ steps.mutation_score.outputs.mutation_score }}';
          const comment = `## Mutation Testing Results
          
          **Mutation Score**: ${score}
          
          📊 Full report available in workflow artifacts.
          📖 See [MUTATION_TESTING.md](https://github.com/${{ github.repository }}/blob/main/MUTATION_TESTING.md) for details.
          
          *Note: This is a non-blocking check. Review surviving mutations and improve test coverage as needed.*`;
          
          github.rest.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: comment
          });