a detailed technical report on architecture

Can you provide a detailed technical report on architecture, especially regarding the implementation architecture design of routing strategy, KV cache offloading, and autoscaling? In fact, it is still a bit difficult to clarify the responsibilities and relationships of current components.

Additionally, I'm also confused about the version correspondence between Aibrix and vLLM. The latest version of vLLM already supports PD disaggregation, but since Aibrix's underlying layer is based on the vLLM engine, why doesn't it support this yet? I suppose this confusion largely stems from a lack of understanding of the overall architecture.

For deployment engineers using Aibrix, understanding its architecture will likely facilitate better utilization of the platform.

No files, tests, or entry points are named. Start by mapping the current Aibrix components and their relationships around routing strategy, KV cache offloading, and autoscaling, then investigate the Aibrix and vLLM version correspondence and PD disaggregation question. Done means a detailed architecture report that resolves these responsibilities and deployment-engineer questions.

Written by the indexing model from the issue text.