Praxen v1.0.0-rc.1

What's Changed

• ci: bump actions/github-script from 7 to 9 by @dependabot[bot] in #98
• docs: ABV concept page, consistency pass, Mermaid rendering, and authoring guide by @virtualsteve-exa in #99
• prep(1.0): security backstops, CI manifest gate, stability contract, docs polish by @virtualsteve-exa in #103
• docs(#105): examples-vs-scan-targets clarity + Codex operator UX by @virtualsteve-exa in #107
• release(1.0.0-rc.1): version bump + prerelease tooling + suite validation by @virtualsteve-exa in #108

Full Changelog: v0.8.1...v1.0.0-rc.1