Refactor code structure for improved readability and maintainability

backend/dist/ai/ai.service.d.ts

@@ -0,0 +1,14 @@
+import { FlatCategory } from '../categories/categories.service';
+export declare const AI_CATEGORIZATION_MODEL = "mistral-tiny";
+export type CategorySuggestion = {
+    categoryId: number;
+    categoryName: string;
+    path: string;
+    confidence: 'high' | 'medium' | 'low';
+    usedFallback: boolean;
+};
+export declare class AiService {
+    private readonly logger;
+    suggestCategory(productName: string, categories: FlatCategory[]): Promise<CategorySuggestion>;
+    private fallbackToOvrigt;
+}