feat(loyalty): report EnakPoint apart from money received

Keeps EnakPoint out of the money in on the payment method analytics
(docs/prd-point-coin.md F9, K7, PC-308), the one report that sums payments;
the daily transaction and profit-loss PDFs do not break payments down by
method.

summary.total_amount is now only money actually received. EnakPoint stays
listed as its own method, with points_used, and the summary adds
point_amount, points_used and total_with_points. Each method row says
whether it counts_as_cash_in, and the shares are of the money received, 0
for EnakPoint. The average order value still includes what EnakPoint paid,
since that is part of what the orders were worth. How EnakPoint is booked
waits on note N2.

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

internal/entities/analytics.go

@@ -14,6 +14,8 @@ 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
@@ -173,15 +175,15 @@ type BudgetCutOffWeek struct {
 
 // DashboardOverview represents dashboard overview data
 type DashboardOverview struct {
-	TotalSales        float64 `json:"total_sales"`
-	TotalOrders       int64   `json:"total_orders"`
-	AverageOrderValue float64 `json:"average_order_value"`
-	TotalCustomers    int64   `json:"total_customers"`
-	VoidedOrders      int64   `json:"voided_orders"`
-	RefundedOrders    int64   `json:"refunded_orders"`
-	TotalItemSold     int64   `json:"total_item_sold"`
-	TotalLowStock     int64   `json:"total_low_stock"`
-	TotalProductActive int64  `json:"total_product_active"`
+	TotalSales         float64 `json:"total_sales"`
+	TotalOrders        int64   `json:"total_orders"`
+	AverageOrderValue  float64 `json:"average_order_value"`
+	TotalCustomers     int64   `json:"total_customers"`
+	VoidedOrders       int64   `json:"voided_orders"`
+	RefundedOrders     int64   `json:"refunded_orders"`
+	TotalItemSold      int64   `json:"total_item_sold"`
+	TotalLowStock      int64   `json:"total_low_stock"`
+	TotalProductActive int64   `json:"total_product_active"`
 }
 
 type ProfitLossAnalytics struct {