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KKRainbow 0b27ac2885 feat(credentials): support managed credential synchronization (#2490)
* feat(credentials): support managed credential synchronization

Allow managed callers to upsert credentials with an exact ID, secret,
permissions, reuse policy, and expiry.

Return non-secret attributes plus a public-key fingerprint so callers can
verify relay credential consistency.

Persist imported credentials atomically and preserve identity and expiry
across restarts.

* fix(credentials): make managed upserts durable

Write the candidate credential snapshot before committing it to memory.
Propagate storage failures so controllers can retry instead of observing
false convergence.

Cover a transient storage failure to verify that memory stays unchanged
and the retry persists the credential.

* fix(credentials): atomically replace stored snapshots

Define CredentialStorage::store as an atomic replacement boundary and
use atomic-write-file in the management adapter. This keeps the last
committed credential JSON readable when a replacement fails.

Cover replacement of an existing credential snapshot and keep the
dependency scoped to the management feature.
2026-08-10 23:20:36 +08:00
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