Metric standardizing in ai runtime

[brosoul]

Pull Request Description

AI Runtime merge self metrics with enigne metrics. At present, only Rename standardizing rule of the metrics of the main pod is supported. The main data structures added are as follows:

• HTTPCollector provides metrics collect from other http source
• StandardRule provides the detail implemention of metric merge
• XXX_METRIC_STANDARD_RULES in engine_rules.py records metric merge rules for various inference engines

As shown in the following figure, AI Runtime rename vllm:request_success_total to aibrix:request_success_total according to the rules VLLM_METRIC_STANDARD_RULES (Meanwhile, the original indicators were retained).

Related Issues

Resolves: #106

Important: Before submitting, please complete the description above and review the checklist below.

---

Contribution Guidelines (Expand for Details)

We appreciate your contribution to aibrix! To ensure a smooth review process and maintain high code quality, please adhere to the following guidelines:

Pull Request Title Format

Your PR title should start with one of these prefixes to indicate the nature of the change:

• [Bug]: Corrections to existing functionality
• [CI]: Changes to build process or CI pipeline
• [Docs]: Updates or additions to documentation
• [API]: Modifications to aibrix's API or interface
• [CLI]: Changes or additions to the Command Line Interface
• [Misc]: For changes not covered above (use sparingly)

Note: For changes spanning multiple categories, use multiple prefixes in order of importance.

Submission Checklist

• PR title includes appropriate prefix(es)
• Changes are clearly explained in the PR description
• New and existing tests pass successfully
• Code adheres to project style and best practices
• Documentation updated to reflect changes (if applicable)
• Thorough testing completed, no regressions introduced

By submitting this PR, you confirm that you've read these guidelines and your changes align with the project's contribution standards.

[Jeffwan]

BTW, beside the filtered metrics, do you think we should expose rest of the application metrics? Let's have say

aibrix:request_total
vllm:some_other_uncommon_metrics

[brosoul]

BTW, beside the filtered metrics, do you think we should expose rest of the application metrics? Let's have say顺便说一句，除了过滤的指标之外，您认为我们应该公开其余的应用程序指标吗？让我们说

aibrix:request_total
vllm:some_other_uncommon_metrics

Currently, my approach is to retain the original engine metrics while adding some new metrics based on the rules.

[Jeffwan]

the change looks good to me