fix(VCPBridgeServer): 补充 GET /v1/models 与 /v1/:profile/models 探活路由，兼容第三方客户端连通性检查 - #465

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-node@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/