backend: require confirmation for signed channel updates [CI]

backend/src/MoShiro.Backend.Api/Contracts/PublicDtos.cs

@@ -1,5 +1,8 @@
 namespace MoShiro.Backend.Api;
 
+/// <summary>IPv6 诊断只含配置与网络状态，不包含任一种 IP 地址。</summary>
+public sealed record AgentIpv6Dto(string AgentId, string Name, bool Online, Ipv6DiagnosticDto Ipv6);
+
 /// <summary>汇总：整个时间段由累加器精确合并得出的值（不是各点的平均）。</summary>
 public sealed record SummaryDto(IReadOnlyDictionary<string, double?> Metrics, IReadOnlyDictionary<string, long> Samples, double Coverage);