feat: Refactor order snapshot handling and introduce structured snapshot types

- Added new structured snapshot types for orders and order items to improve data integrity and clarity.
- Updated the Order and OrderItem models to use the new JSONType for snapshots.
- Refactored tests to accommodate the new snapshot structure, ensuring compatibility with legacy data.
- Enhanced the OrdersSnapshot struct to support multiple snapshot types and maintain backward compatibility.
- Introduced new fields for order items and orders to capture detailed snapshot information for auditing and historical display.

backend/database/.transform.yaml

@@ -9,6 +9,7 @@ ignores:
 imports:
   - go.ipao.vip/gen
   - quyun/v2/pkg/consts
+  - quyun/v2/database/fields
 field_type:
   users:
     roles: types.Array[consts.Role]
@@ -37,6 +38,9 @@ field_type:
     type: consts.OrderType
     status: consts.OrderStatus
     currency: consts.Currency
+    snapshot: types.JSONType[fields.OrdersSnapshot]
+  order_items:
+    snapshot: types.JSONType[fields.OrderItemsSnapshot]
   tenant_ledgers:
     type: consts.TenantLedgerType
   tenant_invites: