v0.6.0

[0.6.0] - 2026-09-12

Added

• Experimental lists members list <list-id> --account ... with a source-reviewed
  GET query, explicit account and validated list ID. Returns a bounded users
  collection using private account-scoped cache keys distinct from list-post
  reads. No membership mutations or public fallback; no exhaustive membership or
  live permission/interoperability claim.
• Synthetic request/root/pagination/error and private routing/cache tests plus a
  separately ignored installed-binary list-member smoke procedure.