What

Add permissions: contents: write to the build-Doxygen.yaml caller workflow to fix startup_failure on every push/PR.

Current Behavior

The Generate-Documentation workflow fails with startup_failure (0 jobs created) because the caller workflow lacks the required permissions block for the reusable workflow at kcenon/common_system/.github/workflows/doxygen.yml@main.

Expected Behavior

Workflow succeeds and deploys documentation to GitHub Pages.

Why

GitHub Actions requires caller workflows to explicitly declare permissions when invoking reusable workflows that need elevated token access. The reusable doxygen.yml needs contents: write for peaceiris/actions-gh-pages@v4 deployment.

• Root cause: Introduced when reusable workflow pattern was adopted
• Proven fix: pacs_system applied identical fix on 2026-03-18 (commit e559995f)

Where

• .github/workflows/build-Doxygen.yaml

How

Add permissions block between on: and jobs: sections:

permissions:
  contents: write

Acceptance Criteria

• build-Doxygen.yaml includes permissions: contents: write
• Generate-Documentation workflow passes on next push to main

Related

• Part of Ecosystem vcpkg distribution readiness improvements common_system#531