fix: tower backbone_code tidak tersimpan saat edit

- Ubah map key dari "BackboneCode" ke "backbone_code" di UpdateTowerWithMultipleImages
  agar GORM memetakan ke nama kolom yang benar di database
- Ubah c.PostForm("device_id") ke c.PostForm("dev_id") di UpdateTower controller
  agar konsisten dengan key yang dikirim frontend dan handler CreateTower

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

delivery/controller/tower_controller.go

@@ -282,7 +282,7 @@ func (tc *TowerController) UpdateTower() gin.HandlerFunc {
         towerUpdateDTO := req.UpdateTowerDTO{}
 
         // Optional fields - handle form data
-        if deviceIDStr := c.PostForm("device_id"); deviceIDStr != "" {
+        if deviceIDStr := c.PostForm("dev_id"); deviceIDStr != "" {
             if deviceID, err := uuid.Parse(deviceIDStr); err == nil {
                 towerUpdateDTO.DeviceID = &deviceID
             } else {

usecase/tower_usecase.go

@@ -117,7 +117,7 @@ func (u *towerUsecase) UpdateTowerWithMultipleImages(id uuid.UUID, tower req.Upd
         updates["ImageURL"] = *tower.ImageURL
     }
     if tower.BackboneCode != nil {
-        updates["BackboneCode"] = *tower.BackboneCode
+        updates["backbone_code"] = *tower.BackboneCode
     }
 
     // Handle multiple image uploads