Summary

• Add CI, license, and version badges to README for better visibility
• Create CHANGELOG.md following Keep a Changelog format
• Add SPDX-License-Identifier headers to action files for compliance scanning
• Improve error messages with user-friendly guidance for common failure scenarios
• Add more workflow examples demonstrating real-world use cases

Changes

Badges (README.md)

• CI status badge
• License badge (EUPL-1.2)
• GitHub release version badge

CHANGELOG.md

• Follows Keep a Changelog format
• Documents v1.0.0 features and the unreleased CI/governance work

Error Messages (action.yml files)

User-friendly error messages for:

• Network connection failures (HTTP 000)
• Authentication errors (HTTP 401)
• Permission denied (HTTP 403)
• Not found errors (HTTP 404)
• Server errors (HTTP 5xx)

SPDX Headers

Added # SPDX-License-Identifier: EUPL-1.2 to both action files

Workflow Examples

deploy/README.md:

• Multi-component matrix deployments
• Conditional branch-based deployments
• Deployment with health check

cleanup/README.md:

• Scheduled stale environment cleanup
• Conditional cleanup based on outputs

Test plan

• Verify badges render correctly on GitHub
• Check CHANGELOG.md formatting
• Verify CI passes (shellcheck, actionlint, yamllint)
• Review example workflows for accuracy