Codex Python Engineering Harness v1.2.0

First formal release of the Codex Python Engineering Harness.\n\nHighlights:\n- service, library, and virtual-workspace generation profiles\n- Codex-native AGENTS.md, skills, hooks, and project configuration\n- non-destructive merge and drift checking\n- optional governance profiles and regulatory overlays\n- OpenTelemetry observability boundaries for generated services\n- complete repository and generated-project quality gates\n- public security, versioning, upgrade, and validation documentation\n\nValidated source: f134a85\nValidation run: https://github.com/brunovicco/codex-python-engineering-harness/actions/runs/29540528684