Add Success Rate Column to Suite Tab CSV Export

**Is your feature request related to a problem? Please describe.**

Currently, the "Download CSV" functionality in the Suite tab exports many test execution details but does not include a "Success Rate" column. The success rate is a crucial metric for analyzing test stability over time and should be available in the exported data.
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**Describe the solution you'd like**

- Add a new "Success Rate" column to the CSV export in the Suite tab.
- The "Success Rate" is currently available in test run details -> history tab
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- The idea would be including that metric in the Suite tab Download CSV funtionality
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**Additional context**

- The UI already displays the success rate; this request is to make it available in the exported CSV as well.
- Provides a quick and easy way to analyze test pass rates.
- Helps teams monitor test stability and identify problematic suites.
- Reduces manual effort required to calculate success rates from the exported data.

Start in the Suite tab's Download CSV flow and compare its exported fields with the Success Rate shown in the test run details History tab. Confirm the CSV includes a Success Rate column whose values match the existing UI metric, then verify the export still contains the current suite execution details.

Written by the indexing model from the issue text.