Archive OpenAI plugin draft payload

[Stunspot]

What changed

• Adds the deterministic OpenAI skills-only submission ZIP and custody records.
• Records the created draft, passed skill scan, corrected CanopyOps artwork, listing fields, prompts, and owner-only submission gate.
• Adds reproducibility coverage and updates the 21-document release inventory.

Why

The live OpenAI portal accepts a narrower skills-only manifest interface than the normal installable Codex plugin. This preserves both artifacts and keeps the product-specific canopy-grid identity intact.

Verified

• 18 deterministic repository tests passed.
• Plugin creator validation passed.
• Plugin-readiness audit: 1 skill, 0 errors, 0 warnings.
• Portal scan: canopyops passed.
• Owner attestations remain unchecked; review submission was not executed.