Draft: feat: add MCP telemetry tracking events
Relates to issue #574629
This MR was created by Duo in Session 1164223
Changes
- Add event definitions for
start_mcp_tool_call
andfinish_mcp_tool_call
- Implement telemetry tracking in MCP tool execution flow
- Capture contextual data including tool name, success/failure status, and error details
- Enable visibility into MCP server usage patterns and adoption blockers