Feat: Admin Question Management

backend-services/question-backend-service/src/db/types/questionQuery.ts

@@ -0,0 +1,8 @@
+export interface QuestionQuery {
+  categoryTitle?: string;
+  difficulty?: "Easy" | "Medium" | "Hard";
+  timeLimit?: {
+    $gte?: number;
+    $lte?: number;
+  };
+}