Add Skippy MTP runtime, metrics, and benchmark harness

[i386]

Summary

• Add the native MTP runtime path across Skippy server, runtime, FFI, protocol, and transport layers.
• Wire telemetry and metrics-server storage so MTP runs emit usable run artifacts and counters.
• Add local docs and benchmark corpora for one-stage MTP validation, including longer structured/code-heavy prompts.
• Record the staged MTP experiment outputs under experiments/mtp/ for comparison and follow-up analysis.

Testing

• Ran Rust build/format validation for the touched Skippy and metrics crates.
• Exercised local one-stage benchmark runs against studio54 and verified metrics export and JSON artifact capture.
• Validated benchmark corpus files and guarded runner scripts on the local host.

[ndizazzo]

@i386 Suggest we re-evaluate this since MTP support in llamacpp is now merged

[i386]

@ndizazzo the version I am working on makes use of that PR, I've been tracking it religiously :)

[ndizazzo]

Gotcha gotcha - I thought we had just pulled certain changes in on through the patch stack. I figured we could drop that and just rely on a SHA bump, plus the skippy changes