[Feature Request]: Add ucloud sandbox provider #17999

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Is your feature request related to a problem?

Describe the feature you'd like

Hello, I’m a developer at UCloud, a cloud service provider. We offer a sandbox service that is compatible with the E2B API, and I’d like to ask whether it could be integrated into the RawView platform.

I can submit a PR and maintain the code.

Documentation for our sandbox service: https://astraflow.ucloud.cn/en-us/docs/agent-sandbox

Describe implementation you've considered

No response

Documentation, adoption, use case

Additional information

No response