fix(identity-service): ensure BlockchainWalletHandler is initialized

- Add BlockchainEventConsumerService to InfrastructureModule
- Add BlockchainWalletHandler and MpcKeygenCompletedHandler to ApplicationModule
- Inject event handlers into UserApplicationService to force NestJS initialization
- This ensures onModuleInit is called for event handlers, enabling Kafka event consumption

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/services/identity-service/src/app.module.ts

@@ -15,6 +15,8 @@ import { ReferralsController } from '@/api/controllers/referrals.controller';
 // Application Services
 import { UserApplicationService } from '@/application/services/user-application.service';
 import { TokenService } from '@/application/services/token.service';
+import { BlockchainWalletHandler } from '@/application/event-handlers/blockchain-wallet.handler';
+import { MpcKeygenCompletedHandler } from '@/application/event-handlers/mpc-keygen-completed.handler';
 
 // Domain Services
 import {
@@ -30,6 +32,7 @@ import { MpcKeyShareRepositoryImpl } from '@/infrastructure/persistence/reposito
 import { RedisService } from '@/infrastructure/redis/redis.service';
 import { EventPublisherService } from '@/infrastructure/kafka/event-publisher.service';
 import { MpcEventConsumerService } from '@/infrastructure/kafka/mpc-event-consumer.service';
+import { BlockchainEventConsumerService } from '@/infrastructure/kafka/blockchain-event-consumer.service';
 import { SmsService } from '@/infrastructure/external/sms/sms.service';
 import { BlockchainClientService } from '@/infrastructure/external/blockchain/blockchain-client.service';
 import { MpcClientService, MpcWalletService } from '@/infrastructure/external/mpc';
@@ -53,6 +56,7 @@ import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
     RedisService,
     EventPublisherService,
     MpcEventConsumerService,
+    BlockchainEventConsumerService,
     SmsService,
     MpcClientService,
     MpcWalletService,
@@ -64,6 +68,7 @@ import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
     RedisService,
     EventPublisherService,
     MpcEventConsumerService,
+    BlockchainEventConsumerService,
     SmsService,
     MpcClientService,
     MpcWalletService,
@@ -92,7 +97,13 @@ export class DomainModule {}
 // ============ Application Module ============
 @Module({
   imports: [DomainModule, InfrastructureModule],
-  providers: [UserApplicationService, TokenService],
+  providers: [
+    UserApplicationService,
+    TokenService,
+    // Event Handlers - 通过注入到 UserApplicationService 来确保它们被初始化
+    BlockchainWalletHandler,
+    MpcKeygenCompletedHandler,
+  ],
   exports: [UserApplicationService, TokenService],
 })
 export class ApplicationModule {}

backend/services/identity-service/src/application/services/user-application.service.ts

@@ -16,6 +16,8 @@ import { SmsService } from '@/infrastructure/external/sms/sms.service';
 import { EventPublisherService } from '@/infrastructure/kafka/event-publisher.service';
 import { BlockchainClientService } from '@/infrastructure/external/blockchain/blockchain-client.service';
 import { MpcWalletService } from '@/infrastructure/external/mpc';
+import { BlockchainWalletHandler } from '../event-handlers/blockchain-wallet.handler';
+import { MpcKeygenCompletedHandler } from '../event-handlers/mpc-keygen-completed.handler';
 import { ApplicationError } from '@/shared/exceptions/domain.exception';
 import { generateRandomIdentity } from '@/shared/utils';
 import { MpcKeygenRequestedEvent } from '@/domain/events';
@@ -48,6 +50,9 @@ export class UserApplicationService {
     private readonly redisService: RedisService,
     private readonly smsService: SmsService,
     private readonly eventPublisher: EventPublisherService,
+    // 注入事件处理器以确保它们被 NestJS 实例化并执行 onModuleInit
+    private readonly blockchainWalletHandler: BlockchainWalletHandler,
+    private readonly mpcKeygenCompletedHandler: MpcKeygenCompletedHandler,
   ) {}
 
   /**