Sync CENG-WP-0001/0002 frontmatter with state-hub after fix-consistency.
Resolve ADR-0002 in umbrella, add install docs, contract sync runbook, publishing checklist, and package files whitelist.
Document ADR-0002 resolution, publish readiness, and SharedContracts sync. Update CENG-WP-0001 follow-up to reference CE-WP-0009 and CENG-WP-0002.