[FEATURE] Add real-time sample progress indicator to Testing stage

[NexionisJake]

This commit introduces a progress indicator that displays the number of completed samples and percentage during the 'Testing' stage of test execution, enhancing user visibility into test progress.

Changes:

• Modified mod_test/controllers.py to calculate and return sample progress data in the get_json_data endpoint
• Updated templates/test/by_id.html to display progress information and handle real-time updates via AJAX polling

Implementation details:

• Calculates progress using existing test.results and test.get_customized_regressiontests() data
• No database schema changes required
• Updates every 20 seconds via existing AJAX mechanism
• Displays format: 'X / Y samples (Z%)'
• Backward compatible with existing functionality

The feature provides immediate feedback to users about test execution progress without requiring any infrastructure changes.

Please prefix your pull request with one of the following: [FEATURE] [FIX] [IMPROVEMENT].

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Summary

This PR adds a real-time sample progress indicator to the Testing stage, displaying the number of completed samples and percentage (e.g., "13/25 samples (52%)") as tests execute. This enhancement provides immediate visibility into test execution progress without requiring any database schema changes.

Implementation Approach

• Leverages existing data: Calculates progress from test.results count and test.get_customized_regressiontests() length
• Minimal changes: ~30 lines across 2 files
• Zero infrastructure impact: No database migrations or new dependencies
• Backward compatible: Existing functionality remains unchanged

Testing & Demonstration

Since setting up the full application environment (database, GCP credentials, config files) was not feasible for local testing, I created a standalone HTML demo page to validate the UI/UX implementation and capture screenshots for this PR (with assistance from Claude AI)
This approach was taken because:

• The feature is purely presentational on the frontend
• The backend logic is straightforward (simple arithmetic using existing model methods)
• A demo allows clear visualization of the feature without requiring reviewers to set up test data
• The demo accurately simulates the progress indicator's appearance and behavior in the actual application.

CLOSES #927

[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