Built a load-test runner that fits in one YAML file

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Describe the traffic, get a report, delete the file.

Existing tools are fine but I wanted something a team could read in a pull request. You write a few lines of YAML describing steps and concurrency, run it, and get a table of latency percentiles.

Windsurf wrote the runner. The honest surprise is that my first version reported latency that was far too good, because I was measuring after connection setup rather than before. The numbers were beautiful and completely wrong.