feat: 支持邀请好友功能

packages/server/prisma/schema.prisma

@@ -73,6 +73,7 @@ enum InviteReferralStatus {
 
 model User {
   id                               String   @id @default(uuid())
+  inviteCode                       String?  @unique @map("invite_code") @db.VarChar(6)
   openid                           String   @unique
   unionid                          String?
   phone                            String?
@@ -254,6 +255,8 @@ model Order {
   cardTypeId      String      @map("card_type_id")
   membershipId    String?     @map("membership_id")
   orderNo         String      @unique @map("order_no")
+  inviteInviterId String?     @map("invite_inviter_id")
+  purchasedCategory String?  @map("purchased_category")
   amount          Decimal     @db.Decimal(10, 0)
   status          OrderStatus @default(PENDING)
   wxTransactionId String?     @map("wx_transaction_id")