[HOTFIX] Update pending workflows counting for latest submissions

[vas3a]

This pull request enhances the logic for counting in-progress AI workflow runs by ensuring that only the latest submissions per participant are considered. This improves the accuracy of workflow run metrics and ensures that outdated or superseded submissions do not affect the count. Additionally, the changes include thorough unit tests to validate the new logic and improved logging for better traceability.

Enhancements to in-progress AI workflow run counting:

• Updated the SQL query in ReviewService.getInProgressAiWorkflowRunCount to use a common table expression (WITH latest_submissions AS (...)) that selects only the latest submission per participant, ensuring that the count reflects only the most recent submissions.
• Modified the logging details in the same method to include a new property, latestSubmissionsOnly: true, indicating that only the latest submissions are considered in the count.

Testing improvements:

• Added a unit test in review.service.spec.ts to verify that getInProgressAiWorkflowRunCount accurately counts only in-progress AI workflow runs for the latest submissions and checks that the generated SQL query contains the expected logic.