feat: operator trust root: passkey-signed operator set, signed join codes, nodes verify and pin the chain at enrollment [CI SKIP]

backend/src/MoShiro.Backend.Application/Ports/IAuthStore.cs

@@ -38,6 +38,9 @@ public interface IAuthStore
 
     ValueTask<IReadOnlyList<PasskeyRecord>> ListPasskeysAsync(string userId, CancellationToken ct);
 
+    /// <summary>所有用户的 passkey（操作员集合从这里取）。</summary>
+    ValueTask<IReadOnlyList<PasskeyRecord>> ListAllPasskeysAsync(CancellationToken ct);
+
     /// <summary>只能删自己的。</summary>
     ValueTask<bool> DeletePasskeyAsync(string userId, string credentialId, CancellationToken ct);