FEAT[BE] :add marketing type and conversion fields to marketing entities and services

internal/entities/marketing.go

@@ -14,6 +14,7 @@ type Marketing struct {
 	SoDate        time.Time      `gorm:"type:date;not null"`
 	SalesPersonId uint           `gorm:"not null"`
 	Notes         string         `gorm:"type:text"`
+	MarketingType string         `gorm:"type:varchar(50)"`
 	CreatedBy     uint           `gorm:"not null"`
 	CreatedAt     time.Time      `gorm:"autoCreateTime"`
 	UpdatedAt     time.Time      `gorm:"autoUpdateTime"`