[Feature][Sort] Support transform of embedding

[aloyszhang]

Description

Supporting document(String) embedding transform in sort.
Initially, we supported one-to-one request-response, meaning one source document corresponded to one embedding result.
The embedding service was called via the HTTP protocol.

Use case

In LLM applications, all data ingested should be embedded by the embedding service.
This feature enables this capability in InLong.

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct