chore(docker): 为 mpc-system、api-gateway、infrastructure 添加时区配置
统一所有 Docker 服务时区为 Asia/Shanghai：
mpc-system:
- docker-compose.yml: postgres, session-coordinator, message-router, server-party-1/2/3, server-party-api, account-service
- docker-compose.prod.yml: postgres, message-router, session-coordinator, account-service, server-party-api
- docker-compose.party.yml: postgres, server-party
api-gateway:
- kong-db, kong-migrations, kong
infrastructure:
- consul, jaeger, grafana, minio
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
hailin
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