Namespace isolates keys between different cache use-cases. (e.g. "channel_affinity:v1").

PrefillGroup 用于存储可复用的“组”信息，例如模型组、标签组、端点组等。 Name 字段保持唯一，用于在前端下拉框中展示。 Type 字段用于区分组的类别，可选值如：model、tag、endpoint。 Items 字段使用 JSON 数组保存对应类型的字符串集合，示例： ["gpt-

再正常解析已定义字段

APIError represents an API error response

AccessDeniedError is a direct user-facing access denial message.

ActionDefinition describes a single action exposed by a resource. DefaultRoles lists the role keys that receive this action as part of their baseline