fix: simplified gorm query

internal/accessor/staff/get_by_email.go

@@ -15,7 +15,7 @@ func (sr *StaffRepository) GetStaffByEmail(email string) (*authdomain.Staff, err
 		return nil, errors.New("email is required")
 	}
 
-	if err := sr.DB.Where("email = ?", email).First(&staff).Error; err != nil {
+	if err := sr.DB.First(&staff, "email = ?", email).Error; err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, errors.New("staff not found")
 		}

internal/accessor/staff/get_by_id.go

@@ -14,7 +14,7 @@ func (sr *StaffRepository) GetStaffByID(ID string) (*authdomain.Staff, error) {
 		return nil, errors.New("id is required")
 	}
 
-	if err := sr.DB.Where("id = ? ", ID).First(&staff).Error; err != nil {
+	if err := sr.DB.First(&staff, "id = ? ", ID).Error; err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, errors.New("staff not found")
 		}