Add Pod Port or DP Rank Header

[danehans]

Currently, sim adds the "x-inference-pod" header to responses with the pod name as the value. Since sim supports Data Parallelism (DP), it would be beneficial to included a header in responses that indicates the port number that the request was received on or the rank number that served the request. This would allow tests to check for this header to assert DP.

[danehans]

@irar2 thanks for fixing this issue. Can you ping me when a sim release is cut with the commit that fixes this issue?

[mayabar]

Hi @danehans, a new release containing this fix was created - https://github.com/llm-d/llm-d-inference-sim/releases/tag/v0.6.0