backend moved to separate directory

backend: deleted the old structure

go-backend/internal/models/membership.go

@@ -0,0 +1,15 @@
+package models
+
+import "time"
+
+type Membership struct {
+	CreatedAt           time.Time
+	UpdatedAt           time.Time
+	StartDate           time.Time         `json:"start_date"`
+	EndDate             time.Time         `json:"end_date"`
+	Status              int8              `json:"status" binding:"number,safe_content"`
+	SubscriptionModel   SubscriptionModel `gorm:"foreignKey:SubscriptionModelID" json:"subscription_model"`
+	SubscriptionModelID uint              `json:"subsription_model_id"`
+	ParentMembershipID  uint              `json:"parent_member_id" binding:"omitempty,omitnil,number"`
+	ID                  uint              `json:"id"`
+}