feat(BE-229,234,235,230,231,232,233): purchase request and purchase order and fix master data dto

internal/entities/purchase.go

@@ -20,7 +20,8 @@ type Purchase struct {
 	CreatedBy  uint64     `gorm:"not null"`
 
 	// Relations
-	Supplier    Supplier       `gorm:"foreignKey:SupplierId;references:Id"`
-	Items       []PurchaseItem `gorm:"foreignKey:PurchaseId"`
-	CreatedUser User           `gorm:"foreignKey:CreatedBy;references:Id"`
+	Supplier       Supplier       `gorm:"foreignKey:SupplierId;references:Id"`
+	Items          []PurchaseItem `gorm:"foreignKey:PurchaseId"`
+	CreatedUser    User           `gorm:"foreignKey:CreatedBy;references:Id"`
+	LatestApproval *Approval      `gorm:"-" json:"-"`
 }