/**
 * @swagger
 * components:
 *   schemas:
 *     Transfer:
 *       type: object
 *       required:
 *         - id
 *         - user_id
 *         - amount
 *         - type
 *         - status
 *       properties:
 *         id:
 *           type: integer
 *           description: 转账记录ID
 *         user_id:
 *           type: integer
 *           description: 用户ID
 *         amount:
 *           type: number
 *           format: decimal
 *           description: 转账金额
 *         type:
 *           type: string
 *           enum: [deposit, withdraw, transfer]
 *           description: 转账类型
 *         status:
 *           type: string
 *           enum: [pending, success, failed, cancelled]
 *           description: 转账状态
 *         transaction_id:
 *           type: string
 *           description: 交易单号
 *         payment_method:
 *           type: string
 *           description: 支付方式
 *         bank_info:
 *           type: object
 *           properties:
 *             bank_name:
 *               type: string
 *               description: 银行名称
 *             account_number:
 *               type: string
 *               description: 账户号码
 *             account_name:
 *               type: string
 *               description: 账户名称
 *           description: 银行信息
 *         description:
 *           type: string
 *           description: 转账描述
 *         fee:
 *           type: number
 *           format: decimal
 *           description: 手续费
 *         actual_amount:
 *           type: number
 *           format: decimal
 *           description: 实际到账金额
 *         processed_at:
 *           type: string
 *           format: date-time
 *           description: 处理时间
 *         created_at:
 *           type: string
 *           format: date-time
 *           description: 创建时间
 *         updated_at:
 *           type: string
 *           format: date-time
 *           description: 更新时间
 *         user:
 *           $ref: '#/components/schemas/User'
 *           description: 关联用户信息
 */