feat: Implement GitHub issue validation management and UI enhancements

- Introduced CRUD operations for GitHub issue validation results, including storage and retrieval.
- Added new endpoints for checking validation status, stopping validations, and deleting stored validations.
- Enhanced the GitHub routes to support validation management features.
- Updated the UI to display validation results and manage validation states for GitHub issues.
- Integrated event handling for validation progress and completion notifications.

apps/ui/src/hooks/use-settings-migration.ts

@@ -222,6 +222,7 @@ export async function syncSettingsToServer(): Promise<boolean> {
       defaultAIProfileId: state.defaultAIProfileId,
       muteDoneSound: state.muteDoneSound,
       enhancementModel: state.enhancementModel,
+      validationModel: state.validationModel,
       keyboardShortcuts: state.keyboardShortcuts,
       aiProfiles: state.aiProfiles,
       projects: state.projects,