fix(docker): 添加阿里云KYC环境变量到docker-compose

在identity-service中添加:
- ALIYUN_KYC_ENABLED
- ALIYUN_KYC_ENDPOINT
- ALIYUN_KYC_SCENE_ID

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

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

backend/services/docker-compose.yml

@@ -159,6 +159,10 @@ services:
       - ALIYUN_SMS_TEMPLATE_CODE=${ALIYUN_SMS_TEMPLATE_CODE}
       - ALIYUN_SMS_ENDPOINT=${ALIYUN_SMS_ENDPOINT:-dysmsapi.aliyuncs.com}
       - SMS_ENABLED=${SMS_ENABLED:-false}
+      # Aliyun KYC Service (阿里云实人认证)
+      - ALIYUN_KYC_ENABLED=${ALIYUN_KYC_ENABLED:-false}
+      - ALIYUN_KYC_ENDPOINT=${ALIYUN_KYC_ENDPOINT:-cloudauth.aliyuncs.com}
+      - ALIYUN_KYC_SCENE_ID=${ALIYUN_KYC_SCENE_ID:-}
     depends_on:
       postgres:
         condition: service_healthy