feat(runtime): track node lifecycle and QUIC link state

backend/src/MoShiro.Backend.Application/ApplicationServiceCollectionExtensions.cs

@@ -16,6 +16,7 @@ public static class ApplicationServiceCollectionExtensions
         services.AddHostedService<StartupTasks>();
 
         services.AddSingleton<AgentRuntime>();
+        services.AddSingleton<ProbeRuntime>();
         services.AddSingleton<ProbeQuicRuntime>();
         services.AddSingleton<LiveHub>();
         services.AddSingleton<HotLayer>();