feat(loyalty): remove paying with EnakPoint

EnakPoint can only be redeemed for vouchers now: it can no longer pay for
orders and is never cashed out (docs/enakgame-prd.md §3.2, EG-001,
EG-002). No order was ever paid with EnakPoint, so there is no data to
move.

Removed:
- POST /customer/wallet/payment-code, POST /customer/orders/:id/pay-with-points
  and GET /orders/:id/point-payment/preview, with their processors,
  repositories, services, handlers and tests.
- The point payment method type: paying, splitting and refunding with it,
  the outlet filter on the method list, and the system-method guard.
- points and payment_code on CreatePayment; points_used and point_value
  on payments; accepts_point_payment on the customer outlets.
- The outlet point_payment settings. A PUT that still sends them is
  rejected as an unknown field.
- The EnakPoint split in the payment method analytics.
- PAYMENT and PAYMENT_REFUND from the wallet type rules. Tests that used
  them as a generic EnakPoint debit use REWARD_REDEEM.
- The EnakPoint-paid part from the earning basis, which is
  subtotal − discount again.

Migration 000102 drops the trigger, the point methods and their index,
the payments columns, and the outlet settings, and restores the method
type CHECK without point. payments.payment_method_id is ON DELETE
RESTRICT, so it fails rather than lose a payment made with EnakPoint.

The integration docs list the removed endpoints and fields, and the
EnakPoint & EnakCoin PRD and tasks note what is superseded.

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

internal/entities/analytics.go

@@ -14,8 +14,6 @@ type PaymentMethodAnalytics struct {
 	TotalAmount       float64   `json:"total_amount"`
 	OrderCount        int64     `json:"order_count"`
 	PaymentCount      int64     `json:"payment_count"`
-	// EnakPoint used, for the EnakPoint method.
-	PointsUsed int64 `json:"points_used"`
 }
 
 // SalesAnalytics represents sales analytics data

internal/entities/payment.go

@@ -13,16 +13,13 @@ const (
 	PaymentMethodTypeCash          PaymentMethodType = "cash"
 	PaymentMethodTypeCard          PaymentMethodType = "card"
 	PaymentMethodTypeDigitalWallet PaymentMethodType = "digital_wallet"
-	// The system method for paying with EnakPoint (docs/prd-point-coin.md F9). One per
-	// organization; it cannot be created, deleted or retyped through the API.
-	PaymentMethodTypePoint PaymentMethodType = "point"
 )
 
 type PaymentMethod struct {
 	ID             uuid.UUID         `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
 	OrganizationID uuid.UUID         `gorm:"type:uuid;not null;index" json:"organization_id" validate:"required"`
 	Name           string            `gorm:"not null;size:100" json:"name" validate:"required,min=1,max=100"`
-	Type           PaymentMethodType `gorm:"not null;size:50" json:"type" validate:"required,oneof=cash card digital_wallet point"`
+	Type           PaymentMethodType `gorm:"not null;size:50" json:"type" validate:"required,oneof=cash card digital_wallet"`
 	Processor      *string           `gorm:"size:100" json:"processor"`
 	Configuration  Metadata          `gorm:"type:jsonb;default:'{}'" json:"configuration"`
 	IsActive       bool              `gorm:"default:true" json:"is_active"`
@@ -72,16 +69,12 @@ type Payment struct {
 	SplitType        *SplitType               `gorm:"size:20" json:"split_type,omitempty"`
 	SplitDescription *string                  `gorm:"size:255" json:"split_description,omitempty"`
 	RefundAmount     float64                  `gorm:"type:decimal(10,2);default:0.00" json:"refund_amount"`
-	// Set only for a payment with EnakPoint: how many were used, and the rupiah value of
-	// one then, frozen so a refund returns exactly what was used.
-	PointsUsed   *int64     `json:"points_used,omitempty"`
-	PointValue   *float64   `gorm:"type:decimal(10,2)" json:"point_value,omitempty"`
-	RefundReason *string    `gorm:"size:255" json:"refund_reason,omitempty"`
-	RefundedAt   *time.Time `gorm:"" json:"refunded_at,omitempty"`
-	RefundedBy   *uuid.UUID `gorm:"type:uuid" json:"refunded_by,omitempty"`
-	Metadata     Metadata   `gorm:"type:jsonb;default:'{}'" json:"metadata"`
-	CreatedAt    time.Time  `gorm:"autoCreateTime" json:"created_at"`
-	UpdatedAt    time.Time  `gorm:"autoUpdateTime" json:"updated_at"`
+	RefundReason     *string                  `gorm:"size:255" json:"refund_reason,omitempty"`
+	RefundedAt       *time.Time               `gorm:"" json:"refunded_at,omitempty"`
+	RefundedBy       *uuid.UUID               `gorm:"type:uuid" json:"refunded_by,omitempty"`
+	Metadata         Metadata                 `gorm:"type:jsonb;default:'{}'" json:"metadata"`
+	CreatedAt        time.Time                `gorm:"autoCreateTime" json:"created_at"`
+	UpdatedAt        time.Time                `gorm:"autoUpdateTime" json:"updated_at"`
 
 	Order             Order              `gorm:"foreignKey:OrderID" json:"order,omitempty"`
 	PaymentMethod     PaymentMethod      `gorm:"foreignKey:PaymentMethodID" json:"payment_method,omitempty"`