Add raw values to tooltips for Code Suggestions Acceptance Rate by Language chart

Summary

The Code Suggestions Acceptance Rate by Language chart currently displays only percentage values in tooltips. To improve transparency and provide better debugging capabilities, we should include raw values (accepted count and shown count) in the tooltips.

Proposal

Possible Implementation

• Pass hidden data series to chart via setVisualizationOverrides while ensuring that values are formatted separately
• Pass contextual data in response and update BarChart to handle it seamlessly