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EnakPoint & EnakCoin PRD and tasks note what is superseded.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/processor/analytics_processor.go

@@ -63,37 +63,27 @@ func (p *AnalyticsProcessorImpl) GetPaymentMethodAnalytics(ctx context.Context,
 		return nil, fmt.Errorf("failed to get payment method analytics: %w", err)
 	}
 
-	// EnakPoint is not money in (docs/prd-point-coin.md F9, K7): it is listed as its own
-	// method but left out of the money received and of the shares. How it is booked
-	// waits on note N2.
-	var cashAmount, pointAmount float64
-	var pointsUsed int64
+	var totalAmount float64
 	var totalOrders int64
 	var totalPayments int64
 
 	for _, data := range analyticsData {
-		if data.PaymentMethodType == string(constants.PaymentMethodTypePoint) {
-			pointAmount += data.TotalAmount
-			pointsUsed += data.PointsUsed
-		} else {
-			cashAmount += data.TotalAmount
-		}
+		totalAmount += data.TotalAmount
 		totalOrders += data.OrderCount
 		totalPayments += data.PaymentCount
 	}
 
-	// The value of an order includes what EnakPoint paid, so the average does too.
 	var averageOrderValue float64
 	if totalOrders > 0 {
-		averageOrderValue = (cashAmount + pointAmount) / float64(totalOrders)
+		averageOrderValue = totalAmount / float64(totalOrders)
 	}
 
+	// Calculate percentages
 	var resultData []models.PaymentMethodAnalyticsData
 	for _, data := range analyticsData {
-		cashIn := data.PaymentMethodType != string(constants.PaymentMethodTypePoint)
 		var percentage float64
-		if cashIn && cashAmount > 0 {
-			percentage = (data.TotalAmount / cashAmount) * 100
+		if totalAmount > 0 {
+			percentage = (data.TotalAmount / totalAmount) * 100
 		}
 
 		resultData = append(resultData, models.PaymentMethodAnalyticsData{
@@ -104,16 +94,11 @@ func (p *AnalyticsProcessorImpl) GetPaymentMethodAnalytics(ctx context.Context,
 			OrderCount:        data.OrderCount,
 			PaymentCount:      data.PaymentCount,
 			Percentage:        percentage,
-			PointsUsed:        data.PointsUsed,
-			CountsAsCashIn:    cashIn,
 		})
 	}
 
 	summary := models.PaymentMethodSummary{
-		TotalAmount:       cashAmount,
-		PointAmount:       pointAmount,
-		PointsUsed:        pointsUsed,
-		TotalWithPoints:   cashAmount + pointAmount,
+		TotalAmount:       totalAmount,
 		TotalOrders:       totalOrders,
 		TotalPayments:     totalPayments,
 		AverageOrderValue: averageOrderValue,