fix(mining-wallet): fix Kafka consumers not subscribing to topics

- Change consumers from @Injectable to @Controller for @EventPattern to work
- Move consumers from providers to controllers array in module
- Add subscribe.fromBeginning config to Kafka microservice

The consumers were not receiving messages because NestJS microservices
require @EventPattern handlers to be in @Controller classes, not just
@Injectable services.

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

backend/services/mining-wallet-service/src/application/application.module.ts

@@ -17,6 +17,11 @@ import { UserRegisteredConsumer } from '../infrastructure/kafka/consumers/user-r
 
 @Module({
   imports: [ScheduleModule.forRoot()],
+  controllers: [
+    // Kafka Consumers (微服务消息处理器需要是 Controller)
+    ContributionDistributionConsumer,
+    UserRegisteredConsumer,
+  ],
   providers: [
     // Services
     SystemAccountService,
@@ -26,9 +31,6 @@ import { UserRegisteredConsumer } from '../infrastructure/kafka/consumers/user-r
     // Schedulers
     OutboxScheduler,
     ContributionExpiryScheduler,
-    // Consumers
-    ContributionDistributionConsumer,
-    UserRegisteredConsumer,
   ],
   exports: [
     SystemAccountService,

backend/services/mining-wallet-service/src/infrastructure/kafka/consumers/contribution-distribution.consumer.ts

@@ -1,4 +1,4 @@
-import { Injectable, Logger, OnModuleInit } from '@nestjs/common';
+import { Controller, Logger, OnModuleInit } from '@nestjs/common';
 import { EventPattern, Payload } from '@nestjs/microservices';
 import Decimal from 'decimal.js';
 import { PrismaService } from '../../persistence/prisma/prisma.service';
@@ -14,7 +14,7 @@ import {
 // 4小时 TTL（秒）
 const IDEMPOTENCY_TTL_SECONDS = 4 * 60 * 60;
 
-@Injectable()
+@Controller()
 export class ContributionDistributionConsumer implements OnModuleInit {
   private readonly logger = new Logger(ContributionDistributionConsumer.name);
 

backend/services/mining-wallet-service/src/infrastructure/kafka/consumers/user-registered.consumer.ts

@@ -1,4 +1,4 @@
-import { Injectable, Logger, OnModuleInit } from '@nestjs/common';
+import { Controller, Logger, OnModuleInit } from '@nestjs/common';
 import { EventPattern, Payload } from '@nestjs/microservices';
 import { RedisService } from '../../redis/redis.service';
 import { ProcessedEventRepository } from '../../persistence/repositories/processed-event.repository';
@@ -8,7 +8,7 @@ import { UserRegisteredEvent } from '../events/contribution-distribution.event';
 // 4小时 TTL（秒）
 const IDEMPOTENCY_TTL_SECONDS = 4 * 60 * 60;
 
-@Injectable()
+@Controller()
 export class UserRegisteredConsumer implements OnModuleInit {
   private readonly logger = new Logger(UserRegisteredConsumer.name);
 

backend/services/mining-wallet-service/src/main.ts

@@ -56,6 +56,10 @@ async function bootstrap() {
       consumer: {
         groupId: 'mining-wallet-service-group',
       },
+      subscribe: {
+        // 显式订阅需要消费的 topics
+        fromBeginning: true,
+      },
     },
   });