docs-09: Write Missing Command Docs For Spec, Govern, Code-Review, Codebase

[djm81]

Summary

Write 11 new command reference pages covering all undocumented commands across spec, govern, code-review, and codebase bundles.

OpenSpec Change

• Change folder: openspec/changes/docs-09-missing-command-docs/
• Priority: P1
• Depends on: docs-06-modules-site-ia-restructure

New Pages

spec: validate, generate-tests, mock | govern: enforce, patch | code-review: run, ledger, rules | codebase: analyze, drift, repro

Source Plan

specfact-cli-internal/docs/internal/implementation/2026-03-23-docs-refactoring-beginner-to-enterprise-plan.md