MS-1288 PR check optimisation (simple stuff)

[luhmirin-s]

JIRA ticket

Notable changes

• Sonar is only run if PR is ready for review
• When new commit is pushed to a PR, previous run will be cancelled
• PR-check will not be triggered if only documentation or GH files have changed
• All test tasks in group are run with a single gradle command to cut overhead

Additional work checklist

• Effect on other features and security has been considered
• Design document marked as "In development" (if applicable)
• External (Gitbook) and internal (Confluence) Documentation is up to date (or ticket created)
• Test cases in Testiny are up to date (or ticket created)
• Other teams notified about the changes (if applicable)

[Copilot]

Pull request overview

This PR optimizes GitHub Actions workflows to reduce CI execution time and resource usage. It implements several performance improvements including conditional Sonar scanning, workflow run cancellation on new commits, smarter path filtering, and batched Gradle task execution.

Changes:

• Sonar scans now only run when PRs are ready for review or triggered manually
• New commits to PRs automatically cancel in-progress workflow runs
• Workflows skip when only documentation or GitHub configuration files change
• Unit tests now execute all modules in a single Gradle command instead of sequential individual commands

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/pr-checks.yml	Adds path filtering for docs/GitHub files, concurrency control for canceling in-progress runs, and conditional execution of Sonar scans
.github/workflows/reusable-run-unit-tests.yml	Refactors test execution to aggregate all module tasks into a single Gradle command with --continue flag

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud