Enhance filament schema by adding vendor reference and improving formatting

- Introduced a new optional field `vendor` in the filament schema to reference the vendor associated with the filament.
- Improved code formatting for better readability and maintainability, including consistent indentation and line breaks.
- Ensured that the `recalculate` method remains functional with updated schema structure.

src/database/schemas/management/filament.schema.js

@@ -3,9 +3,11 @@ import { generateId } from '../../utils.js';
 const { Schema } = mongoose;
 
 // Filament base - cost and tax; color and cost override at FilamentSKU
-const filamentSchema = new mongoose.Schema({
+const filamentSchema = new mongoose.Schema(
+  {
     _reference: { type: String, default: () => generateId()() },
     name: { required: true, type: String },
+    vendor: { required: false, type: Schema.Types.ObjectId, ref: 'vendor' },
     barcode: { required: false, type: String },
     url: { required: false, type: String },
     image: { required: false, type: Buffer },
@@ -14,9 +16,15 @@ const filamentSchema = new mongoose.Schema({
     density: { required: true, type: Number },
     emptySpoolWeight: { required: true, type: Number },
     cost: { type: Number, required: false },
-  costTaxRate: { type: Schema.Types.ObjectId, ref: 'taxRate', required: false },
-  costWithTax: { type: Number, required: false },
-}, { timestamps: true });
+    costTaxRate: {
+      type: Schema.Types.ObjectId,
+      ref: 'taxRate',
+      required: false
+    },
+    costWithTax: { type: Number, required: false }
+  },
+  { timestamps: true }
+);
 
 filamentSchema.index({ name: 'text', barcode: 'text', url: 'text' });
 
@@ -28,7 +36,10 @@ filamentSchema.set('toJSON', { virtuals: true });
 
 filamentSchema.statics.recalculate = async function (filament, user) {
   const filamentSkuModel = mongoose.model('filamentSku');
-  const skus = await filamentSkuModel.find({ filament: filament._id }).select('_id').lean();
+  const skus = await filamentSkuModel
+    .find({ filament: filament._id })
+    .select('_id')
+    .lean();
   for (const sku of skus) {
     await filamentSkuModel.recalculate(sku, user);
   }