feat: probe host stats, node cards with a separate lines panel grouped by carrier, Windows host sampling, manual carrier override [CI]

backend/src/MoShiro.Backend.Application/Live/LiveHub.cs

@@ -17,7 +17,7 @@ public sealed record ChunkSignal(NodeId AgentId, string Series) : LiveSignal;
 public sealed record TestSignal(TestId TestId) : LiveSignal;
 
 /// <summary>某个 Agent 的主机资源占用有了新的快照（实时推给展示页）。</summary>
-public sealed record HostSignal(NodeId AgentId, HostSnapshot Host) : LiveSignal;
+public sealed record HostSignal(NodeId Node, HostSnapshot Host) : LiveSignal;
 
 public sealed class LiveSubscription : IDisposable
 {