fix: 添加 ENCRYPTION_KEY 环境变量到 docker-compose

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker-compose.yml

@@ -52,6 +52,7 @@ services:
       - DB_NAME=${DB_NAME:-aigcspace_test}
       - REDIS_URL=redis://redis:6379
       - REDIS_PASSWORD=${REDIS_PASSWORD:-redis123}
+      - ENCRYPTION_KEY=${ENCRYPTION_KEY:-wxcz-aigc-default-encryption-key}
       - APP_HOST=0.0.0.0
       - APP_PORT=8010
       - DEBUG=${DEBUG:-false}