fix(injection): docker-compose 添加注入钱包环境变量 + 未配置时不启用消费者

问题：
  .env 配置了 FUSDT_INJECTION_WALLET_USERNAME 和 FUSDT_INJECTION_WALLET_ADDRESS，
  但 docker-compose.2.0.yml 没有将这两个变量传入容器，导致容器内 process.env
  拿不到值，Adoption Injection Consumer 启动后报错。

修复：
  1. docker-compose.2.0.yml: 添加 FUSDT_INJECTION_WALLET_USERNAME/ADDRESS
     和 CDC_TOPIC_CONTRIBUTION_OUTBOX 环境变量传递
  2. AdoptionInjectionConsumerService: onModuleInit 检查钱包是否配置，
     未配置时跳过 Kafka 连接（不浪费消费者组资源）
  3. AdoptionInjectionHandler: 检查 Consumer 是否启用，未启用时不注册

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

backend/services/docker-compose.2.0.yml

@@ -460,6 +460,11 @@ services:
       BURN_POOL_WALLET_ADDRESS: ${BURN_POOL_WALLET_ADDRESS:-}
       MINING_POOL_WALLET_USERNAME: ${MINING_POOL_WALLET_USERNAME:-}
       MINING_POOL_WALLET_ADDRESS: ${MINING_POOL_WALLET_ADDRESS:-}
+      # fUSDT 注入钱包 (MPC) - 认种自动转积分值到做市商
+      FUSDT_INJECTION_WALLET_USERNAME: ${FUSDT_INJECTION_WALLET_USERNAME:-}
+      FUSDT_INJECTION_WALLET_ADDRESS: ${FUSDT_INJECTION_WALLET_ADDRESS:-}
+      # CDC 主题配置（Debezium CDC outbox）
+      CDC_TOPIC_CONTRIBUTION_OUTBOX: ${CDC_TOPIC_CONTRIBUTION_OUTBOX:-cdc.contribution.outbox}
       # 区块扫描配置
       BLOCK_SCAN_INTERVAL_MS: ${BLOCK_SCAN_INTERVAL_MS:-5000}
       BLOCK_CONFIRMATIONS_REQUIRED: ${BLOCK_CONFIRMATIONS_REQUIRED:-12}

backend/services/mining-blockchain-service/src/application/event-handlers/adoption-injection.handler.ts

@@ -40,6 +40,10 @@ export class AdoptionInjectionHandler implements OnModuleInit {
   ) {}
 
   onModuleInit() {
+    if (!this.injectionConsumer.isEnabled()) {
+      this.logger.warn(`[INIT] Adoption Injection Consumer 未启用，Handler 不注册`);
+      return;
+    }
     this.injectionConsumer.onAdoptionInjectionRequested(
       this.handleInjection.bind(this),
     );

backend/services/mining-blockchain-service/src/infrastructure/kafka/adoption-injection-consumer.service.ts

@@ -30,6 +30,7 @@ export class AdoptionInjectionConsumerService implements OnModuleInit, OnModuleD
   private readonly topic: string;
 
   private injectionHandler?: AdoptionInjectionEventHandler;
+  private enabled = false;
 
   constructor(private readonly configService: ConfigService) {
     this.topic = this.configService.get<string>(
@@ -38,7 +39,19 @@ export class AdoptionInjectionConsumerService implements OnModuleInit, OnModuleD
     );
   }
 
+  isEnabled(): boolean {
+    return this.enabled;
+  }
+
   async onModuleInit() {
+    // 未配置注入钱包时不启用消费者
+    const walletUsername = this.configService.get<string>('FUSDT_INJECTION_WALLET_USERNAME');
+    const walletAddress = this.configService.get<string>('FUSDT_INJECTION_WALLET_ADDRESS');
+    if (!walletUsername || !walletAddress) {
+      this.logger.warn(`[INIT] fUSDT 注入钱包未配置，Adoption Injection Consumer 不启用`);
+      return;
+    }
+
     const brokers = this.configService.get<string>('KAFKA_BROKERS')?.split(',') || ['localhost:9092'];
     const clientId = this.configService.get<string>('KAFKA_CLIENT_ID') || 'mining-blockchain-service';
     const groupId = 'mining-blockchain-adoption-injection';
@@ -81,6 +94,7 @@ export class AdoptionInjectionConsumerService implements OnModuleInit, OnModuleD
       this.logger.log(`[SUBSCRIBE] Subscribed to ${this.topic}`);
 
       await this.startConsuming();
+      this.enabled = true;
     } catch (error) {
       this.logger.error(`[ERROR] Failed to connect Adoption Injection consumer`, error);
     }