Fixes#5148.
Add opt-in durable managed member summaries and authenticated paging while preserving complete default output, original Evidence, cleanup ownership and queued cancellation.
Verified with bounded real Newtonsoft/Redux/Rust tasks, independent oracles, 556 focused tests and the expanded domain gate; paired token estimates and latency tradeoffs are recorded in experiments/analysis-efficiency/managed-cli.md.
morluto