chore: logs potential boostrap error on restart

[peppescg]

A bunch of time we have this error during an app restarting ( in particular after an app upgrade ). In order to debug it, let's add more logs and see what cause the issue

[2025-10-08 15:48:40.900] [error] Error: TypeError: Failed to fetch (localhost:50074)
    at Object.beforeLoad (file:///Users/giuseppe/workspace/toolhive-react/out/ToolHive-darwin-arm64/ToolHive.app/Contents/Resources/app.asar/.vite/renderer/main_window/assets/index-CY_Ujpgk.js:507:58651)
    at async uC (file:///Users/giuseppe/workspace/toolhive-react/out/ToolHive-darwin-arm64/ToolHive.app/Contents/Resources/app.asar/.vite/renderer/main_window/assets/index-CY_Ujpgk.js:54:66510)
    at async file:///Users/giuseppe/workspace/toolhive-react/out/ToolHive-darwin-arm64/ToolHive.app/Contents/Resources/app.asar/.vite/renderer/main_window/assets/index-CY_Ujpgk.js:54:77352
[2025-10-08 15:48:42.262] [info]  Container engines are now available, restarting ToolHive...

[Copilot]

Pull Request Overview

This PR adds comprehensive error logging and Sentry telemetry to help debug bootstrap failures that occur during app restarts, particularly after upgrades. The focus is on capturing detailed context about the application state when health checks fail.

Key changes:

• Enhanced error handling in the root route's beforeLoad function with detailed logging
• Added Sentry error reporting with contextual information about Toolhive and container engine status
• Improved error messaging to distinguish health check failures from generic errors

[samuv]

🔍