Zero Defect for Codex 0.1.9

First production-ready Codex distribution of Zero Defect.\n\n- Adds a repository marketplace and Codex plugin manifest.\n- Reuses the canonical Claude 1.4.0 workflow, contract, and seven reviewer prompts without modifying or duplicating them.\n- Runs seven concurrent, ephemeral, read-only Codex reviewer processes and a separate adjudicator.\n- Fails closed when any reviewer cannot complete.\n- Requires Node.js 22 or newer and an installed, authenticated Codex CLI.\n\nClaude remains independently published as v1.4.0 and is byte-for-byte unchanged.