Implemented restorer, wired up for basic testing. Improved abstractions and fixed observer pattern issues

MoonlightServers.Daemon/ServerSys/Implementations/DockerStatistics.cs

@@ -0,0 +1,34 @@
+using System.Reactive.Linq;
+using System.Reactive.Subjects;
+using MoonlightServers.Daemon.ServerSys.Abstractions;
+
+namespace MoonlightServers.Daemon.ServerSys.Implementations;
+
+public class DockerStatistics : IStatistics
+{
+    public IAsyncObservable<ServerStats> OnStats => OnStatsSubject.ToAsyncObservable();
+
+    private readonly Subject<ServerStats> OnStatsSubject = new();
+    
+    public Task Initialize()
+        => Task.CompletedTask;
+
+    public Task Sync()
+        => Task.CompletedTask;
+    
+    public Task SubscribeToRuntime()
+     => Task.CompletedTask;
+
+    public Task SubscribeToInstallation()
+    => Task.CompletedTask;
+
+    public ServerStats[] GetStats(int count)
+    {
+        return [];
+    }
+    
+    public async ValueTask DisposeAsync()
+    {
+        OnStatsSubject.Dispose();
+    }
+}