feat: add TenantLedger model and query generation

- Introduced TenantLedger model with fields for managing tenant transactions, including ID, TenantID, UserID, OrderID, transaction Type, Amount, and balance details.
- Implemented CRUD operations for TenantLedger with methods for Create, Update, Delete, and Reload.
- Generated query methods for TenantLedger to facilitate database interactions, including filtering, pagination, and aggregation functions.
- Established relationships with Order model for foreign key references.

backend/app/http/tenant/order.go

@@ -0,0 +1,60 @@
+package tenant
+
+import (
+	"time"
+
+	"quyun/v2/app/http/tenant/dto"
+	"quyun/v2/app/services"
+	"quyun/v2/database/models"
+
+	"github.com/gofiber/fiber/v3"
+	log "github.com/sirupsen/logrus"
+)
+
+// order provides tenant-side order endpoints for members (purchase and my orders).
+//
+//	@provider
+type order struct{}
+
+// purchaseContent
+//
+//	@Summary	购买内容（余额支付）
+//	@Tags		Tenant
+//	@Accept		json
+//	@Produce	json
+//	@Param		tenantCode	path		string					true	"Tenant Code"
+//	@Param		contentID	path		int64					true	"ContentID"
+//	@Param		form		body		dto.PurchaseContentForm	true	"Form"
+//	@Success	200			{object}	dto.PurchaseContentResponse
+//
+//	@Router		/t/:tenantCode/v1/contents/:contentID/purchase [post]
+//	@Bind		tenant local key(tenant)
+//	@Bind		user local key(user)
+//	@Bind		contentID path
+//	@Bind		form body
+func (*order) purchaseContent(ctx fiber.Ctx, tenant *models.Tenant, user *models.User, contentID int64, form *dto.PurchaseContentForm) (*dto.PurchaseContentResponse, error) {
+	log.WithFields(log.Fields{
+		"tenant_id":       tenant.ID,
+		"user_id":         user.ID,
+		"content_id":      contentID,
+		"idempotency_key": form.IdempotencyKey,
+	}).Info("tenant.order.purchase_content")
+
+	res, err := services.Order.PurchaseContent(ctx, &services.PurchaseContentParams{
+		TenantID:       tenant.ID,
+		UserID:         user.ID,
+		ContentID:      contentID,
+		IdempotencyKey: form.IdempotencyKey,
+		Now:            time.Now(),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return &dto.PurchaseContentResponse{
+		Order:      res.Order,
+		Item:       res.OrderItem,
+		Access:     res.Access,
+		AmountPaid: res.AmountPaid,
+	}, nil
+}