【WIP】zmq https

[amy-why-3459]

Purpose

Test Plan

Test Result

---

Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[github-actions]

👋 Hi! Thank you for contributing to the vLLM project.

💬 Join our developer Slack at https://slack.vllm.ai to discuss your PR in #pr-reviews, coordinate on features in #feat- channels, or join special interest groups in #sig- channels.

Just a reminder: PRs would not trigger full CI run by default. Instead, it would only run fastcheck CI which starts running only a small and essential subset of CI tests to quickly catch errors. You can run other CI tests on top of those by going to your fastcheck build on Buildkite UI (linked in the PR checks section) and unblock them. If you do not have permission to unblock, ping simon-mo or khluu to add you in our Buildkite org.

Once the PR is approved and ready to go, your PR reviewer(s) can run CI to test the changes comprehensively before merging.

To run CI, PR reviewers can either: Add ready label to the PR or enable auto-merge.

🚀

[gemini-code-assist]

Code Review

This pull request introduces a ZMQ-based HTTP proxy for disaggregated inference, along with a shell script to run it. The changes also include modifications to the data handling protocols. My review focuses on a critical bug in the new shell script that would prevent it from working correctly due to mismatched command-line arguments with the Python script it calls. I've provided a fix for this issue.

[gemini-code-assist]

The argument names --encode-addr-list and --pd-addr-list used here do not match the argument names expected by zmq_http_proxy.py, which are --encode-addrs and --pd-addrs. This mismatch will cause the script to fail when trying to start the HTTP server. Please correct the argument names to match the Python script.

Suggested change

	--encode-addr-list $(for ((i=0; i<ENCODER_NUMBER; i++)); do echo -n "${ENCODER_ADDR_PREFIX}_$i "; done) \
	--pd-addr-list $(for ((i=0; i<PD_NUMBER; i++)); do echo -n "${PD_ADDR_PREFIX}_$i "; done) \
	--encode-addrs $(for ((i=0; i<ENCODER_NUMBER; i++)); do echo -n "${ENCODER_ADDR_PREFIX}_$i "; done) \
	--pd-addrs $(for ((i=0; i<PD_NUMBER; i++)); do echo -n "${PD_ADDR_PREFIX}_$i "; done) \