Refactored evaluation process for improved efficiency:

- Initial response set to null; Frontend now generates a list of anticipated stats;
- Background evaluation dynamically updates DB upon completion;
- Frontend actively monitors and finalizes upon stat evaluation completion.

src/interfaces/exam.ts

@@ -44,6 +44,7 @@ export interface ListeningPart {
 }
 
 export interface UserSolution {
+	id?: string;
 	solutions: any[];
 	module?: Module;
 	exam?: string;