Scene 与 Hilt 的集成问题

Scene 与 @HiltViewModel 的直接集成可能性，使得可以直接在 Scene 中使用 by viewModels() 并让 Hilt 自动处理 @HiltViewModel。现在是维护一个 ViewModelFactoryEntryPoint 接口，为所有需要手动工厂的 ViewModel 在此接口中添加获取方法

Start by reviewing the existing ViewModelFactoryEntryPoint integration and how Scene exposes ViewModel access. Compare that path with Android's @HiltViewModel and by viewModels() requirements. Done means Scene can use by viewModels() with Hilt-managed @HiltViewModel instances without adding per-ViewModel factory getters.

Written by the indexing model from the issue text.