Approve the compatible Codex launcher after independent sandbox checks

Changes: Accept S00-028 launcher documentation and bounded verification; record independent QA evidence and handoff. Preserve source and local configuration.
Validation: Inspected implementation diff/message and exact active argv; bounded CLI help and approved host wrapper with inner workspace-write probe exited 0. Project write/read/remove passed; outside write denied EROFS30. make check passed 72 tests in 18.544s. No additional model or storage task ran.