Clarification on Differences Between s.jina.ai and svip.jina.ai Search Engines

Hi jina-ai team,

We have forked the node-DeepResearch repository and noticed in commit [ae2e7c7](https://github.com/jina-ai/node-DeepResearch/commit/ae2e7c7fc62d8ec164a212afacfaa187d516648d) that the search engine URL was updated from https://s.jina.ai/ to https://svip.jina.ai/ for SERP functionality.

As subscribers to Jina AI, we are using your search engine and reranker APIs in our project. Could you please provide more details about the differences between s.jina.ai and svip.jina.ai? Specifically, we’re interested in understanding:
- What improvements or changes does svip.jina.ai offer compared to s.jina.ai?
- Are there any differences in functionality, performance, or rate limits?

This information will help us decide whether to update our implementation to use the new domain URI. Thank you!