Add debug logging to FalukantService and RevenueSection for better price tracking

- Introduced console logs in FalukantService to trace product price calculations and city evaluations, aiding in debugging and performance monitoring.
- Added logging in RevenueSection to capture the loading process and received better prices for products, enhancing visibility into price retrieval operations.

frontend/src/components/falukant/RevenueSection.vue

@@ -103,12 +103,14 @@
           this.loadingPrices.add(product.id);
           try {
             const currentPrice = parseFloat(this.calculateProductRevenue(product).absolute);
+            console.log(`[RevenueSection] Loading prices for product ${product.id} (${product.labelTr}), currentPrice: ${currentPrice}`);
             const { data } = await apiClient.get('/api/falukant/products/prices-in-cities', {
               params: {
                 productId: product.id,
                 currentPrice: currentPrice
               }
             });
+            console.log(`[RevenueSection] Received better prices for product ${product.id}:`, data);
             this.$set(product, 'betterPrices', data || []);
           } catch (error) {
             console.error(`Error loading prices for product ${product.id}:`, error);