CodeOps for Codex 0.2.0

First stable release of the CodeOps 0.2 workflow surface. Adds dependency-aware target-scoped readiness, schema-2 semantic revisions and validation snapshots, atomic lifecycle transitions and recovery, safe schema-1 upgrades, and exact integration across requirements, preflight, planning, execution, roadmap, feature acceptance, and release workflows. The broader 1.0 comparative and external complex-project pilot gate remains open.