Revert "feat(loyalty): EnakPoint & EnakCoin" (#32)

This reverts merge commit 645da30, returning main to f0ff59f.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/models/payment.go

@@ -28,10 +28,8 @@ type Payment struct {
 }
 
 type CreatePaymentRequest struct {
-	OrderID           uuid.UUID `validate:"required"`
-	PaymentMethodID   uuid.UUID `validate:"required"`
-	Points            *int64
-	PaymentCode       *string
+	OrderID           uuid.UUID                       `validate:"required"`
+	PaymentMethodID   uuid.UUID                       `validate:"required"`
 	Amount            float64                         `validate:"required,min=0"`
 	TransactionID     *string                         `validate:"omitempty"`
 	SplitNumber       int                             `validate:"omitempty,min=1"`
@@ -62,9 +60,6 @@ type PaymentResponse struct {
 	SplitType         *string
 	SplitDescription  *string
 	RefundAmount      float64
-	// Set for a payment with EnakPoint.
-	PointsUsed        *int64
-	PointValue        *float64
 	RefundReason      *string
 	RefundedAt        *time.Time
 	RefundedBy        *uuid.UUID