[GuideLLM Refactor] Complete CSV output

[jaredoconnell]

Summary

This PR gets the CSV output to a state comparable to pre-refactor.

Details

Implements the functions to export the required data to the CSV format.

The goal is to include the required information in the CSV without cluttering it, but also without creating too much of a burden to the future maintainers resulting from referencing specific schema elements.

The following columns are new:

• Profile (an entire JSON dump of the profile)
• Backend (the entire JSON dump of the internal data structure)
• Generator Data

You can view these files in the attached output generated by the following test:
guidellm benchmark run --output-path result_7.csv --max-seconds 2 --target=http://localhost:8000 --data "prompt_tokens=256,output_tokens=128" --rate-type constant --rate 1 --output-formats csv

result_7.csv

Test Plan

Run GuideLLM with the following additional args: --output-path result.csv --output-formats csv

The generated file should have all info required.

Related Issues

This is a part of the scheduler refactor.

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Use of AI

• Includes AI-assisted code completion
• Includes code generated by an AI application
• Includes AI-generated tests (NOTE: AI written tests should have a docstring that includes ## WRITTEN BY AI ##)