Cloud/public memory providers are owner-managed infrastructure. The RPC
read path is owner-gated separately; this aligns executor, history
compaction, and thread-clear purge with the same boundary so non-owner
members cannot load credentials or reach external endpoints at runtime.
Deployment-owner local/private providers remain available to all Space
members when the deployment owner configured them.
Co-authored-by: cynarAI <cynarAI@users.noreply.github.com>
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