[Feat] Use the lmcache 0.3.5 for kvaware routing

[zerofishnoodles]

[Feat] Use the lmcache 0.3.5 for kvaware routing

• Upgrade lmcache to 0.3.5
• Modify lmcache call parameters
• Fix Env

FIX #xxxx (link existing issues this PR will resolve)

BEFORE SUBMITTING, PLEASE READ THE CHECKLIST BELOW AND FILL IN THE DESCRIPTION ABOVE

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Thank you for your contribution to production-stack! Before submitting the pull request, please ensure the PR meets the following criteria. This helps us maintain the code quality and improve the efficiency of the review process.

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Please try to classify PRs for easy understanding of the type of changes. The PR title is prefixed appropriately to indicate the type of change. Please use one of the following:

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[gemini-code-assist]

Summary of Changes

Hello @zerofishnoodles, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on integrating an updated version of the lmcache library to enhance kv-aware routing capabilities. It involves updating core dependencies, adjusting how lmcache messages are constructed to improve traceability, and modifying deployment configurations to support the new lmcache features, ensuring a more robust and observable routing mechanism.

Highlights

• Dependency Upgrade: The lmcache library has been upgraded to version 0.3.5, and huggingface-hub has been updated to 0.34.0, ensuring compatibility and leveraging new features from these versions.
• LMcache Parameter Modification: Calls to lmcache messages (LookupMsg and QueryInstMsg) now include a unique event_id parameter, which will aid in tracing and debugging within the lmcache system.
• Environment Configuration Updates: New environment variables and configuration parameters related to lmcache's distributed URL have been introduced in Helm templates and tutorial assets to support kv-aware routing setup.
• Helm Chart Refinement: The router image tag in the Helm chart tutorial has been simplified from kvaware-latest to latest.

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[gemini-code-assist]

Code Review

This pull request upgrades lmcache to version 0.3.5 and adapts the code for KV-aware routing. The changes include updating dependencies, modifying Helm chart environment variables, and passing new event_id parameters in the routing logic. My review focuses on improving code consistency, maintainability, and removing outdated comments. I've identified a potentially inconsistent environment variable name, a stale comment in pyproject.toml, and a code duplication that could be refactored.

[Shaoting-Feng]

LGTM