backend: require confirmation for signed channel updates [CI]

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

@@ -69,6 +69,8 @@ public interface IProbeStore
     /// <summary>新增或整条更新（轮换密钥、改名都走这里）。</summary>
     ValueTask SaveAsync(ProbeRecord probe, CancellationToken ct);
 
+    ValueTask SetIpv6DiagnosticsAsync(string id, string diagnosticsJson, CancellationToken ct);
+
     /// <summary>吊销：保留记录，公钥立即从所有 Agent 的名单里移除。已经吊销的返回 false。</summary>
     ValueTask<bool> RevokeAsync(string id, long nowMs, CancellationToken ct);