引入的 veo3.1 fast 8s 全部没有权限

[CEastWind]

commit 796880a 引入的 veo3.1 fast 8s 全部没有权限，4s 和 6s 没有问题。账号是 Ultra 账号。

sse返回错误：
data: {"id": "chatcmpl-1783575453", "object": "chat.completion.chunk", "created": 1783575453, "model": "flow2api", "choices": [{"index": 0, "delta": {"reasoning_content": "错误: 生成失败: Flow API request failed: PUBLIC_ERROR_MODEL_ACCESS_DENIED: The caller does not have permission\n"}, "finish_reason": null}]}

data: {"error": {"message": "生成失败: Flow API request failed: PUBLIC_ERROR_MODEL_ACCESS_DENIED: The caller does not have permission", "type": "server_error", "code": "generation_failed", "status_code": 500}}