fix(mining-admin): use Prisma relationMode=prisma for CDC sync tables

Switch to Prisma's "prisma" relation mode to handle CDC event ordering issues.
This mode emulates foreign key relations at the Prisma Client layer instead of
creating database-level FK constraints, which is the recommended approach for
CDC scenarios where event arrival order cannot be guaranteed.

Reference: https://www.prisma.io/docs/orm/prisma-schema/data-model/relations/relation-mode

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/mining-admin-service/prisma/migrations/20260113000000_use_prisma_relation_mode/migration.sql

@@ -1,7 +1,9 @@
 -- =============================================================================
--- 移除 CDC 同步表的外键约束
+-- 切换到 Prisma relationMode = "prisma"
+-- 移除数据库层的外键约束，改由 Prisma Client 在应用层模拟外键关系
+--
 -- 原因：CDC 事件异步到达，顺序不可控，子表记录可能在父表记录之前到达
--- 参考：https://estuary.dev/blog/cdc-done-correctly/
+-- 参考：https://www.prisma.io/docs/orm/prisma-schema/data-model/relations/relation-mode
 -- =============================================================================
 
 -- 移除 synced_contribution_accounts 表的外键约束
@@ -19,3 +21,16 @@ DROP CONSTRAINT IF EXISTS "synced_mining_accounts_accountSequence_fkey";
 -- 移除 synced_trading_accounts 表的外键约束
 ALTER TABLE "synced_trading_accounts"
 DROP CONSTRAINT IF EXISTS "synced_trading_accounts_accountSequence_fkey";
+
+-- 为 accountSequence 字段添加索引以优化 JOIN 性能（如果不存在）
+CREATE INDEX IF NOT EXISTS "synced_contribution_accounts_accountSequence_idx"
+ON "synced_contribution_accounts"("accountSequence");
+
+CREATE INDEX IF NOT EXISTS "synced_referrals_accountSequence_idx"
+ON "synced_referrals"("accountSequence");
+
+CREATE INDEX IF NOT EXISTS "synced_mining_accounts_accountSequence_idx"
+ON "synced_mining_accounts"("accountSequence");
+
+CREATE INDEX IF NOT EXISTS "synced_trading_accounts_accountSequence_idx"
+ON "synced_trading_accounts"("accountSequence");

backend/services/mining-admin-service/prisma/schema.prisma

@@ -5,6 +5,7 @@ generator client {
 datasource db {
   provider     = "postgresql"
   url          = env("DATABASE_URL")
+  relationMode = "prisma"  // CDC场景：Prisma层模拟外键关系，数据库不创建FK约束
 }
 
 // =============================================================================
@@ -163,8 +164,11 @@ model SyncedUser {
   syncedAt          DateTime @default(now())
   updatedAt         DateTime @updatedAt
 
-  // CDC 同步表不设置外键约束，因为事件到达顺序不可控
-  // 使用 accountSequence 作为逻辑关联键，查询时用 LEFT JOIN
+  // 关联同步表
+  contributionAccount SyncedContributionAccount?
+  miningAccount       SyncedMiningAccount?
+  tradingAccount      SyncedTradingAccount?
+  referral            SyncedReferral?
 
   @@index([phone])
   @@index([status])
@@ -179,7 +183,7 @@ model SyncedUser {
 
 model SyncedContributionAccount {
   id                      String   @id @default(uuid())
-  accountSequence         String   @unique  // 逻辑关联 SyncedUser.accountSequence，无外键约束
+  accountSequence         String   @unique
   personalContribution    Decimal  @db.Decimal(30, 8) @default(0)
   teamLevelContribution   Decimal  @db.Decimal(30, 8) @default(0)
   teamBonusContribution   Decimal  @db.Decimal(30, 8) @default(0)
@@ -192,6 +196,8 @@ model SyncedContributionAccount {
   syncedAt                DateTime @default(now())
   updatedAt               DateTime @updatedAt
 
+  user                    SyncedUser @relation(fields: [accountSequence], references: [accountSequence])
+
   @@map("synced_contribution_accounts")
 }
 
@@ -201,7 +207,7 @@ model SyncedContributionAccount {
 
 model SyncedReferral {
   id                      String   @id @default(uuid())
-  accountSequence         String   @unique  // 逻辑关联 SyncedUser.accountSequence，无外键约束
+  accountSequence         String   @unique
   referrerAccountSequence String?  // 推荐人账户序列号
   referrerUserId          BigInt?  // 1.0 的 referrer_id
   originalUserId          BigInt?  // 1.0 的 user_id
@@ -210,6 +216,8 @@ model SyncedReferral {
   syncedAt                DateTime @default(now())
   updatedAt               DateTime @updatedAt
 
+  user                    SyncedUser @relation(fields: [accountSequence], references: [accountSequence])
+
   @@index([referrerAccountSequence])
   @@index([depth])
   @@map("synced_referrals")
@@ -301,7 +309,7 @@ model SyncedNetworkProgress {
 
 model SyncedMiningAccount {
   id                String   @id @default(uuid())
-  accountSequence   String   @unique  // 逻辑关联 SyncedUser.accountSequence，无外键约束
+  accountSequence   String   @unique
   totalMined        Decimal  @db.Decimal(30, 8) @default(0)
   availableBalance  Decimal  @db.Decimal(30, 8) @default(0)
   frozenBalance     Decimal  @db.Decimal(30, 8) @default(0)
@@ -309,6 +317,8 @@ model SyncedMiningAccount {
   syncedAt          DateTime @default(now())
   updatedAt         DateTime @updatedAt
 
+  user              SyncedUser @relation(fields: [accountSequence], references: [accountSequence])
+
   @@map("synced_mining_accounts")
 }
 
@@ -318,7 +328,7 @@ model SyncedMiningAccount {
 
 model SyncedTradingAccount {
   id              String   @id @default(uuid())
-  accountSequence String   @unique  // 逻辑关联 SyncedUser.accountSequence，无外键约束
+  accountSequence String   @unique
   shareBalance    Decimal  @db.Decimal(30, 8) @default(0)
   cashBalance     Decimal  @db.Decimal(30, 8) @default(0)
   frozenShares    Decimal  @db.Decimal(30, 8) @default(0)
@@ -328,6 +338,8 @@ model SyncedTradingAccount {
   syncedAt        DateTime @default(now())
   updatedAt       DateTime @updatedAt
 
+  user            SyncedUser @relation(fields: [accountSequence], references: [accountSequence])
+
   @@map("synced_trading_accounts")
 }