Read immutable pin descriptions and eligible manifests through the canonical
shared-state reader, retaining admission, snapshot scope, exact artifact bytes,
and first-resource error order. Capture pin and catalog facts before awaits so
caller mutation cannot mix revisions or change the selected filesystem host.
Await the existing per-root node fixture cleanup before deleting test state.
No schema, retention, durability, permission, or dependency change is introduced.
SOCIAL SHARE CARD GENERATOR