feat(ci): enhance FHIR validation workflow with precheck summaries and artifact uploads

[patrick-werner]

This pull request significantly improves the FHIR validation workflow by introducing a dedicated precheck step for meta.profile requirements, enhancing reporting, and making the validation process more robust and transparent. It also updates the versions of several GitHub Actions for improved compatibility and security. The key changes are grouped below:

FHIR Validation Workflow Improvements (.github/workflows/fhir-validation.yml):

• Introduced a precheck step to verify that all candidate resources contain a meta.profile field with at least one entry starting with the required prefix (http://hl7.eu/fhir/). The precheck results (including counts and file lists for failures) are outputted and used to gate the main validation steps. [1] [2] [3] [4] [5]
• Validation steps (Java setup, validator download/cache, execution, summary rendering) are now only run if the precheck passes, preventing unnecessary validation runs on non-compliant files. [1] [2] [3] [4] [5]
• Added a detailed precheck summary artifact (precheck-summary.md) that is always generated and uploaded, listing missing profiles and missing prefixes (with truncation for large lists), and marking pass/fail status for use in PR comments. [1] [2]
• The workflow now fails early with a clear message if the precheck does not pass, rather than proceeding to the full validator.

Pull Request Comment Enhancements (.github/workflows/pr-comment.yml):

• The PR comment workflow now fetches and includes the precheck summary artifact. If the precheck failed, the summary is prepended to the main validation comment, ensuring reviewers see precheck results first. [1] [2] [3] [4] [5]

GitHub Actions Version Updates:

• Updated several GitHub Actions to newer versions for improved stability and support: actions/checkout@v4, actions/setup-java@v4, actions/cache@v4, actions/download-artifact@v4, and actions/upload-pages-artifact@v3. [1] [2] [3] [4] [5]

These changes collectively make the validation process more reliable, provide clearer feedback to contributors, and ensure that only compliant resources proceed to full validation.

[github-actions]

FHIR Validation Summary

No validation summary artifact was available for this run.

Artifacts

Download fhir-validation-html-report (includes validation.html and validation.json)

Validation run: https://github.com/patrick-werner/ehds-examples/actions/runs/26018888457