fix : BOM구성 API, DB 작업

- product_components 컬럼 변경
- BOM 구성, 카테고리리스트, BOM트리(재귀)호출 API 개발

app/Models/Products/ProductComponent.php

@@ -2,6 +2,7 @@
 
 namespace App\Models\Products;
 
+use App\Models\Materials\Material;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
 use App\Traits\ModelTrait;
@@ -16,12 +17,12 @@ class ProductComponent extends Model
     protected $fillable = [
         'tenant_id',
         'parent_product_id',
+        'category_id',
+        'category_name',
         'ref_type',
-        'child_product_id',
-        'material_id',
+        'ref_id',
         'quantity',
         'sort_order',
-        'is_default',
         'created_by',
         'updated_by',
     ];
@@ -60,7 +61,7 @@ public function childProduct()
      */
     public function material()
     {
-        return $this->belongsTo(\App\Models\Materials\Material::class, 'material_id');
+        return $this->belongsTo(Material::class, 'material_id');
     }
 
     // ---------------------------------------------------