fix(authorization-service): fix KafkaModule dependency injection

- Add ClientsModule with KAFKA_SERVICE registration
- Add EventAckPublisher to KafkaModule providers/exports
- Move EventConsumerController to AppModule (has access to repositories)

Resolves: Nest can't resolve dependencies of EventConsumerController

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

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

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

@@ -19,6 +19,7 @@ import {
 } from '@/infrastructure/persistence/repositories/monthly-assessment.repository.impl'
 import { RedisModule } from '@/infrastructure/redis/redis.module'
 import { KafkaModule } from '@/infrastructure/kafka/kafka.module'
+import { EventConsumerController } from '@/infrastructure/kafka/event-consumer.controller'
 
 // Application
 import { AuthorizationApplicationService, REFERRAL_REPOSITORY, TEAM_STATISTICS_REPOSITORY } from '@/application/services'
@@ -69,7 +70,7 @@ const MockTeamStatisticsRepository = {
     RedisModule,
     KafkaModule,
   ],
-  controllers: [AuthorizationController, AdminAuthorizationController, HealthController],
+  controllers: [AuthorizationController, AdminAuthorizationController, HealthController, EventConsumerController],
   providers: [
     // Prisma
     PrismaService,

backend/services/authorization-service/src/infrastructure/kafka/kafka.module.ts

@@ -1,11 +1,33 @@
 import { Module, Global } from '@nestjs/common'
+import { ConfigModule, ConfigService } from '@nestjs/config'
+import { ClientsModule, Transport } from '@nestjs/microservices'
 import { EventPublisherService } from './event-publisher.service'
-import { EventConsumerController } from './event-consumer.controller'
+import { EventAckPublisher } from './event-ack.publisher'
 
 @Global()
 @Module({
-  controllers: [EventConsumerController],
-  providers: [EventPublisherService],
-  exports: [EventPublisherService],
+  imports: [
+    ClientsModule.registerAsync([
+      {
+        name: 'KAFKA_SERVICE',
+        imports: [ConfigModule],
+        useFactory: (configService: ConfigService) => ({
+          transport: Transport.KAFKA,
+          options: {
+            client: {
+              clientId: configService.get<string>('KAFKA_CLIENT_ID', 'authorization-service'),
+              brokers: configService.get<string>('KAFKA_BROKERS', 'localhost:9092').split(','),
+            },
+            consumer: {
+              groupId: configService.get<string>('KAFKA_GROUP_ID', 'authorization-service-group'),
+            },
+          },
+        }),
+        inject: [ConfigService],
+      },
+    ]),
+  ],
+  providers: [EventPublisherService, EventAckPublisher],
+  exports: [EventPublisherService, EventAckPublisher, ClientsModule],
 })
 export class KafkaModule {}