Preview a non-executing External Source Scaffold release-execution-evidence suite

Compiles a non-executing owner-gated release-execution-evidence suite from ready release-execution-preflight packets or nested preflight inputs plus owner-supplied manual release execution receipt, operator attestation, finished-at timestamp, manual result value, production smoke result, post-release observation result, final docs/public-discovery confirmation, owner closeout, and rollback result refs when failed or rolled back. The response exposes per-workstream evidence checklists, blockers, preflight status, result classifications, and next actions while keeping evidence recording by helper, release execution start, release decision execution, release executor dispatch, PR merge, owner release approval by helper, production release, production smoke execution, and docs/public discovery mutation disabled. This preview writes no records and cannot execute implementation, run production smoke, release production, publish public discovery, mutate routes, mutate Seller OS, mutate trust/ranking, activate or mutate x402, move wallets, settle, dispatch providers, run browser automation, write or promote memory, perform live finance actions, or expose private Full ECF payloads.