Snapshot peers before concurrent status collection and release the state lock before local metadata and IAM reads. Keep result indexing, peer credentials and errors tied to that snapshot; return a copied current peer state with cached IAM data.
Cover storage, remote requests, configuration changes, cancellation and cached peer state. Confirm the healing entry and all five helpers with deterministic writer probes under the race detector. Refs #341.
Signed-off-by: Feng Ruohang <rh@vonng.com>