Preview a non-executing External Source Scaffold activation implementation suite

Compiles a non-executing owner-gated implementation packet suite from an activation-plan suite or nested activation-plan input for all or selected External Source Scaffold Program workstreams. The response exposes implementation packets, owner-review status, validation commands, docs sync, rollback plans, blockers, and next PR actions while keeping implementation execution and production activation disabled. This preview writes no records and cannot execute implementation, launch 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.