Refactor product model by removing unused sellCostMinNeutral and sellCostMaxNeutral fields, and simplify product insertion logic in initialization script.

backend/models/falukant/type/product.js

@@ -16,17 +16,6 @@ ProductType.init({
     sellCost: {
         type: DataTypes.INTEGER,
         allowNull: false}
-    ,
-    sellCostMinNeutral: {
-        type: DataTypes.DECIMAL,
-        allowNull: true,
-        field: 'sell_cost_min_neutral'
-    },
-    sellCostMaxNeutral: {
-        type: DataTypes.DECIMAL,
-        allowNull: true,
-        field: 'sell_cost_max_neutral'
-    }
 }, {
     sequelize,
     modelName: 'ProductType',

backend/utils/falukant/initializeFalukantPredefines.js

@@ -282,11 +282,7 @@ async function initializeFalukantProducts() {
         { labelTr: 'ox', category: 5, productionTime: 5, sellCost: 60 },
     ];
 
-    const productsToInsert = baseProducts.map(p => ({
-        ...p,
-        sellCostMinNeutral: Math.ceil(p.sellCost * factorMin),
-        sellCostMaxNeutral: Math.ceil(p.sellCost * factorMax),
-    }));
+    const productsToInsert = baseProducts;
 
     await ProductType.bulkCreate(productsToInsert, {
         ignoreDuplicates: true,