oz CLI alpha adds JSON and Markdown output

The oz CLI alpha now supports structured output. Every discovery command can emit JSON for scripts and pipelines, or Markdown for documentation and pull requests, alongside the existing terminal summary.

The flags follow the usual conventions: --output json for machine-readable results and --output markdown for a document you can paste into a review. Output is generated locally from the same read-only discovery pass — nothing leaves your machine.

The change came directly from early users wiring oz into onboarding docs and architecture reviews. If a format or field is missing for your workflow, open an issue in the repository with the command and the output you expected.