Approve patch 0.1.2 Python publication

[docushell-dev]

Summary

• record decider approval for the exact deterministic patch 0.1.2 Python PyPI wheel publication request
• add a release-candidate guard for the approval decision and wire it after the request guard
• update validation/status/checklist/changelog references while keeping actual PyPI upload, Python public install wording, package tag creation, hosted, production, Windows, bundled PDFium, benchmark, ethos-doc, and ethos-rag surfaces blocked

Verification

• PYTHONDONTWRITEBYTECODE=1 python3 .github/scripts/test_patch_0_1_2_python_publication_approval_decision.py
• PYTHONDONTWRITEBYTECODE=1 python3 .github/scripts/test_patch_0_1_2_python_publication_approval_request.py
• PYTHONDONTWRITEBYTECODE=1 python3 .github/scripts/test_release_candidate_prep.py
• PYTHONDONTWRITEBYTECODE=1 python3 .github/scripts/test_execution_status.py
• PYTHONDONTWRITEBYTECODE=1 python3 .github/scripts/public_boundary_claims_gate.py
• git diff --check
• make light-check PYTHON=python3
• make milestone-e-prep PYTHON=python3
• make release-candidate-prep PYTHON=python3